Every gardener does so at some point in their gardening carrier. Because, greenhouses are a great asset, with no doubt.
The best thing about greenhouses is, they let your garden every month of the year which is heavenly to a gardener. They also represent a considerable commitment in time, money, and space.
Greenhouses are ideal homes for your plants to protect themselves from too chilled weather that they don’t like. What greenhouses do is, they trap heat and humidity that the plants need, and make them feel home.
- So, You’re Thinking About Purchasing the Best Greenhouse for your needs?
- Top 10 Best Greenhouse list
- Considering everything, the Best GreenHouses to Buy from the below:
- 01. Best Overall: Exaco Junior Victorian J-VIC 24 96 Square Foot Greenhouse
- 02. Best Bang for the Buck: Palram HG5008 Mythos Hobby Greenhouse, 6′ x 8′ x 7′, Silver
- 03. Best Mini GreenHouse: Gardman 4-Tier Mini GreenHouse
- 04. Best Lean-To GreenHouse: Palram Hybrid Lean Greenhouse
- 05. Best for Growing Enthusiast: Palram Snap & Grow Series Hobby Greenhouse
- 06. Best for Grow Tent: Quictent 2 Doors Portable Greenhouse Large Green Garden Hot House Grow Tent More
- 07. Best for Large Plants: Quictent 2 Doors 20 Stakes Heavy Duty Portable Greenhouse
- 08. Best Greenhouse for Winter: Rion Grand Gardener 2 Clear Greenhouse
- 09. Great bang for the dollar: Best Choice Products SKY1917 15x7x7ft Portable Large Walk-in
- 10. Abba Patio Large Walk in Fully Enclosed Greenhouse with Windows
- All You Need Know Before Buying A Green House Kit :
- Final Words
So, You’re Thinking About Purchasing the Best Greenhouse for your needs?
Usually, greenhouses are used to protect outdoor plants from a particular season. But they can also be used to transfer ‘indoor-raised warmth-loving plants’ to outside, as they keep things warm.
No matter which purpose you’d want to use your greenhouse for, you’d want to make sure you buy a good one that gets the job done for you.
Here comes the tricky part, because choosing the right greenhouse is not a piece of cake. This is one hell of a tricky job since you need to consider a lot of things before making the decision.
That’s why you might want to thoroughly go through the things that I’m about to tell you now. Because
Picking the best greenhouse is more about understanding greenhouses better and identifying your needs, more than the product itself. So, check out the knowledgebase section for more details (After Product Review Section)
Top 10 Best Greenhouse list
||Exaco Victorian J-VIC 2496||• Wind Load: 120 MPH • 2 roof windows • Size 150 x 93 x 100 inches • Weight- 807 pounds .|
|Palram HG5008G-1B||• Frame aluminum • Covering polycarbonate • Size 97 x 73 x 82 inches • Weight 90 pounds|
||Gardman R687 4-Tier||• Frame Steel • Covering clear polyethylene • Size 19 x 27 x 63 inches • Weight 9.6 pounds|
||Palram Hybrid Lean Greenhouse||• Frame polycarbonate • Rust resistant aluminum frame • Size 96 x 49 x 88.6 inches • Weight 61 pounds|
||Portable Mini Greenhouse||• Frame aluminum • Covering polycarbonate panels • Size 100 x 98 x 102.4 inches • Weight 148 pounds|
||Quictent 2 Doors||• Frame steel • Covering polyethylene • Size 10.2 x 9.3 x 7.8 inches • Weight 44.1 pounds|
|Quictent Heavy Duty||• Frame steel • Covering polyethylene • Size 19.7 x 10 x 6.6 ft • Weight 59 pounds|
||Rion Grand Clear||• Frame Heavy duty resin • Covering polycarbonate panels • Size 103.9 x 105.1 x 93.5 inches • Weight 225 pounds|
||Best Choice Products SKY1917||• Frame steel • Covering heavy-duty pastic • Size 180" x 84"x 84"inches • Weight 61.3 pounds|
||Abba Patio Large Walk||• Frame steel • Covering transparent PE • Size 67.7 x 9.8 x 9.8 inches • Weight 74.9 pounds|
Considering everything, the Best GreenHouses to Buy from the below:
01. Best Overall: Exaco Junior Victorian J-VIC 24 96 Square Foot Greenhouse
The Junior Victorian Greenhouse is one of the premier greenhouses in the line of greenhouses and it looks aesthetically beautiful. Thanks to the premium aluminum frame of it. Aluminum, to me, is the best option for greenhouse framing and they’ve got that is decent pricing. Good job!
Materials, Design & Features
The premium aluminum frame makes not only look astonishing but also makes the house sturdy. The polycarbonate covering the frame is one of the strongest in the series as well, with 6-mm thickness
Overall, the construction material and engineering have made the Exaco Junior Victorian J-VIC
an amazingly tough Greenhouse.
I got information from the true user that it can withstand over 70 miles an hour winds for two straight days, without getting any scar on itself. That’s impressive.
The European style greenhouse has two sliding doors with a magnetic key locker which tends to work smoothly without any complaint.
It has got plenty of space in it, with a measurement of 150 x 93 x 100 inches. This will be more than enough space for any hobby gardener.
This is a complete greenhouse kit that comes with the frame, 3″ frame extension. On top of that, 4 mm tempered glass windows, sliding frame door, and two opening roof windows take this model to the next level.
For the downside, I thought assembly could’ve been easier. With the current configuration, assembling the house is not a piece of cake. Though you’ll need to assemble once only.
02. Best Bang for the Buck: Palram HG5008 Mythos Hobby Greenhouse, 6′ x 8′ x 7′, Silver
The Palram Hybrid greenhouse brings you the best of both Worlds; a durable aluminum-made 6′ wide frame that is designed perfectly for your growing needs in smaller spaces, along with the precise balance of twin-wall polycarbonate covering.
Materials, Design & Features
The 4-mm thick twin-wall polycarbonate is amazingly strong, and it is virtually unbreakable.
The roof polycarbonate will block up to 99.9% of UV rays and eliminates the risk of plant burn by diffusing sunlight. The side panels made with crystal clear polycarbonate will provide 90% light transmission.
The aluminum frame looks elegant and it’s rust-resistant, so it will last longer. The frame lays a strong foundation for the house combining with a heavy-duty galvanized steel base for structural support.
The space inside is pretty generous but not as large as the Climapod. It offers around 48 sq. ft of growing space that I think will be enough for most hobby gardeners.
If it ain’t, then you should go for any larger greenhouse like the Climapod’s Virtue Kit or Palram’s very own Hobby Series that I’m going to review below.
The greenhouse helps sustainable irrigation, with an integrated rain gutter that channels the water.
It has got a lockable door handle and a magnetic door catch. You’ll get a single roof vent with it that helps moderate temperature & airflow to maximize growing conditions.
For additional convenience, there are 10 polypropylene-made plant hangers included with it that you can use to hang baskets or to support vine crops. This can help to install shade cloth to the inside frame of the greenhouse as well.
The assembly this time is pretty simple, not like the Climapod virtue. But your ample common sense will be needed to understand the instructions better. It’s better if you can have a helper. Expect the greenhouse to seem very flimsy until you completely assemble and anchor it.
Overall, I did not find any major drawbacks to the greenhouse. It looks very premium and offers a lot standing at such a price point. Undoubtedly, it’s the best bang for your buck.
03. Best Mini GreenHouse: Gardman 4-Tier Mini GreenHouse
If you’ve got your space at a premium, you might be looking for the Gardman 4-tier mini greenhouse.
At just 27″ Length x 18″ Width x 63″ Height, this greenhouse has a small footprint and accommodates four 18″ deep shelves that offer decent gardening space for you. This is an ideal greenhouse for homes or small backyards where space is an issue.
I saw that some people have used this mini greenhouse even in indoors. But you have to be cautious about the fact that this house has no floor on the bottom, so without you installing one by yourself, you might be having dirt and water all over your floor.
There might not be a floor, but there’s a convenient roll-up zippered door in it for easy access.
Materials, Design & Features
Gardeners have mentioned that the PVC used as a cover in this one, does a terrific job of holding in both humidity and heat.
Good thing is, Gardman themselves sale the covering of this house separately, so you won’t have to replace the whole house if the cover gets damaged for any incident.
This is an ideal compact greenhouse for giving your seeds, seedlings, and young plants an early start. But this one is not for serious gardening tasks like growing in winters.
It’s constructed well with a strong push-fit powder-coated tubular steel frame that is engineered for simple push-fit assembly without requiring any tools.
But, not well that it can hold larger plants. This house is made for small plants and seedlings, which it can carry pretty easily. If you need to warm larger plants than that, consider investing in a larger house.
If I had to ask for any enhancement on this house, I’d like to see a vent in the top of this house, this is something it lacks. Also, though it’s not too wobbly, it not super stable as well.
If you buy a unit of this, I suggest you place it on something you have laying around which will help it to be more stable on the floor. You can also use hooks to zip it with any sturdy support around.
04. Best Lean-To GreenHouse: Palram Hybrid Lean Greenhouse
If you particularly want a lean-to greenhouse then the Ogrow’s lean-to greenhouse is the best choice for this category. This will fit at the back of your house, garage, or any other structure that you want to it.
Materials, Design & Features
This 54” by 86” lean-to house will add 25 sq. ft of growing space onto any existing structure you have. You can help protect tender vegetation and have easy access to your plants by situating your plant house close to a building.
The frame one is made of aluminum that is 0.8 mm thick that has the support of a steel base plinth. Combinedly they lay a solid, shockproof structure for the 4mm thick twin-wall polycarbonate covering that has good insulation from frost.
And the whole frame has got a green coating on it to prevent it further from rusting, fading or tarnishing.
Being sturdy itself along with having the support of a building or structure, the greenhouse is tougher against storms and hazards.
The polycarbonate is very efficient at retaining heat so heating cost is low for this greenhouse, decreasing the size of your electricity bill. The covering can ensure an even temperature within the range of -25° to 60°C, creating an ideal growing environment.
The smooth sliding door on this helps you to utilize the whole space inside the house. The roof vent ensures the constant airflow which is significantly important for successful greenhouse propagation, and along with the sliding door, it allows for full cross ventilation.
And, the rain gutter is also there to allow for the capture and efficient use of rainwater.
The assembly takes time. You’ll need patiently follow the instruction and assemble it, only once though.
For the bottom line, if you are must purchase a lean-to greenhouse, this amazing package from OGrow is a choice that you can’t go wrong about.
05. Best for Growing Enthusiast: Palram Snap & Grow Series Hobby Greenhouse
Coming in multiple sizes, the Palram Snap & Grows hobby series can be a great choice for growing enthusiasts.
This greenhouse helps your plants to harden themselves automatically from day one, which makes them tougher against the harsh outdoor environment that they have to face after the relocation. This also helps to reduce the risk of losing plants after transplanting.
Materials, Design & Features
The frame is aluminum made which gets the support of the galvanized steel base. It’s rust-resistant and is there to stay.
Polycarbonate used on this house is made with only virgin materials that didn’t become brittle or turn colors over time, as gardeners reported.
The chances of plants getting burnt inside this are very minimal, thanks to the over 90% transmission of light at 100% UV protection ability of the polycarbonate.
Convenient and useful features are there. Integrated rain gutters work well to efficiently use resources like rainwater. It disperses the rainwater that can be collected for a sustainable irrigation system.
The roof vent and split door design combinedly ensure added ventilation by keeping the oxygen flowing.
However, there are no shelves that come with the original package, so keep in mind that you’ll need to purchase them separately if you need them.
Like all the other greenhouses, assembling this is not a very easy and one-person task.
Though this offers SmartLock connectors that snap the frame into place and polycarbonate panels easily slide into its channels, which most of the greenhouses don’t offer.
Yet you need to ensure that you install it on a leveled piece of land and a helper is there to help you out with things. Also, don’t forget to wear gloves as the aluminum frame and polycarbonate has sharp edges.
To sum up, I think it’s a great option for growing enthusiasts which has no major drawback and comes in multiple space options for satisfying everyone’s needs.
06. Best for Grow Tent: Quictent 2 Doors Portable Greenhouse Large Green Garden Hot House Grow Tent More
If you love to have a greenhouse that comes with large, lightweight, walk-in features, this model is for you.
Materials, Design & Features
Frames of this greenhouse are crafted with heavy-duty powder-coated steel. Sturdy still frames including middle rails for additional stability made this house capable of coping with adverse weather. You can strengthen further with 12 stakes coming along with the packages.
The cover used in the house is UV protected, 100% waterproof transparent poly material. Premium Reinforced PE leno quality made this cover stronger than regular poly. Having features two zipped front and back door with five side vent helps to increase ventilation.
On top of that, the white cover has been used to increase the light reflection to give an extra boost to your lovely plants. Moreover, it has an overlong cover design making the house more air light and secure.
When you think of better growth of your plants, especially a bit huge plants, this house can be a good choice as the height of 7.84’ allows more space for your big plants to breathe conveniently.
This house does not require heavy tools, in-depth engineering knowledge to set up. It will take just only a few minutes to install. Just bury it in the soil!
However, if you have the chance to face strong wind or a bit storms very often, I would suggest purchasing additional anchoring materials (stakes, weight screws, etc.) to make your house more stable against this rough weather.
07. Best for Large Plants: Quictent 2 Doors 20 Stakes Heavy Duty Portable Greenhouse
Do you think something huge for your big plants?
If you are planning to go with big plants in a spacious house without compromising with lightweight and durability, you should probably go with this house. Quictent 19.7’x10’x6.6′ Portable Greenhouse is a larger house allowing your big plant to grow properly.
Materials, Design & Features
This house has a powder-coated steel frame including middle rails gives additional strength to prolonging its life. On top of that, ten bases and 20 stakes are supplemented with a package that helps to increase the resistance ability against snow and wind.
Improved Poly Ethylene Leno materials make the cover stronger than typical materials that can prevent the covers from tearing or destruction. Not only PE cover provides a stable shelter, but also the perfect environment for your plants and herbs.
Roll-up double doors including eight pcs mosquito windows keep the breeze flowing at the desired level. On the other hand, the extended cover design provides better closure with higher humidity & temperature for growing your plants and herbs.
A good part of this house is that, even after being such a huge house, it takes only a few minutes to set up without using any tools.
You will get a replacement for any defective parts of this greenhouse from the supplier without any charge
However, if there is any chance of a massive wind/storm in your area, you need to take precautionary action, ie attaching extra anchor, screw, etc.
Don’t allow the front face of the house in the direction from the wind predominately blows
Wet or windy conditions may deteriorate the greenhouse life.
08. Best Greenhouse for Winter: Rion Grand Gardener 2 Clear Greenhouse
The Rion Grand Gardener Greenhouse is robust and ideal for the blustery, wet weather, and snow load.
The best part of this house is, it comes with heavy-duty resin frames that withstand extremely severe winters and high winds, and they won’t bend or discolor either.
Materials, Design & Features
It is considered as “top of the line” greenhouse as this house has been re-engineered to make heavy-duty and long-lasting by increasing thickness of panels from 4 mm to 6mm made of 100% UV protected polycarbonate. These materials make this greenhouse great providing extra durability for many years to come.
A barn-style roof design carries plenty of headroom and gives you more space to your plants.
You can quickly assemble using the Pin and Lock connectors, while the roof panels now merely slide into place. An optional base kit will give you a solid foundation and extra stability against the strong wind.
However, set this greenhouse on a concrete pad or a heavy timber foundation to withstand harsh weather and heavy snow load.
However, you may find this house a bit expensive comparing with other typical styles, but when you notice the extraordinary and unique features of this house, you would agree that spending money on this model is reasonable.
As a home gardener, you can be a proud guy having this beautiful Grand Gardener models- this model is not just durable, spacious, and heavy-duty but also a stunning piece.
09. Great bang for the dollar: Best Choice Products SKY1917 15x7x7ft Portable Large Walk-in
This time I brought onto my list that is the excellent bang for the dollar; literally, it cost only $119, yet this tool is sturdy and more massive.
When you think of growing plants, fruits, and vegetables round the year and protecting them from various weather conditions such as rain, wind, and snow, as well as pests, this model comes to you to meet that requirement.
Materials, Design & Features
This model comes to you as weather-resistant meaning that it will protect your plants from rough weather conditions such as rain, wind, and snow. The heavy-duty plastic cover of this greenhouse guarantees long term protection.
Featuring spacious design, this tool helps to grow a wider variety of plants. There are different heights between the spaces of this model that allows keeping your small and large plants side-by-side. Further, it keeps plants safe and organized by offering to shelve on both the left and right sides.
You will be pleased to see its heat and light management system. Zipped-door and eight roll-up windows with screen ensure and manage the required temperature and light.
The good thing is that you can walk-through due to its tunnel design. You can walk comfortably to care for and manage a large number of plants. It has amazing size of 180″(L) x 84″(W) x 84″(H).
Though it offers a very competitive price, that does not mean it comes with low-quality. Extended lasting plastic cover, rust-resistant powder-coated steel tubing, and secure guy ropes ensure will give you worry-free ownership for the years.
We have read a significant amount of reviews from real users; almost all users are happy with the after-sales services they received from the manufacturer. And no doubt, it’s a plus point!
So, if you are on the side of the growth of a wide range of plants, vegetables, and protecting them round the year from harsh weather, you can bet on this model. Most importantly, that will be a great bang for the dollar.
10. Abba Patio Large Walk in Fully Enclosed Greenhouse with Windows
This model comes from a famous brand manufacturer Abba that made this design sleekly, rigorously tested for durability, and featured assembly mechanism super easy from start to finish. The trendy style and true artistry withstand with the years to come.
Materials, Design & Features
It comes to you with large windows that have insect netting to protect your plants from insects. Four large windows on the long sides and a roll-up front door secured with a zipper on each end ensure the convenient access through the house and excellent ventilation for plants and vegetables.
Cover has been made of stable, durable reinforced transparent PE. The sturdy powder-coated steel frame makes this model resist cheeping, peeling, and rust.
Another plus point is that it is equipped with the big footplate that increases stability.
The crucial fact for choosing this model is that it is easy to assemble and disassemble without using any tools, and it is still portable even after assembly.
However, it can be an excellent choice for you. If you are on sides of the portable, lightweight, yet sturdy greenhouse, this model is for you.
All You Need Know Before Buying A Green House Kit :
Selecting the Perfect Site for Your Green House
Buying the best greenhouse is not enough, placing is crucial too. Site selection has a lot to do with the effectiveness of the greenhouse.
You have to consider multiple things to choose the best location for your greenhouse While the sunlight is a major consideration, other things like availability of afternoon shade, accessibility, drainage system, water source, etc. are important factors too.
The best location for the greenhouse is southern exposure. This is the exposure that gets no shade throughout the day.
The next best location is the south-east or eastern exposure, followed by the south-west or western exposure. These locations get some shade in the morning or afternoon but get the daylight throughout the rest of the time of the day.
The least desirable location for greenhouses is the northern exposure since this place gets some shade almost all day long, so lacks the sunlight that the plants need.
Orientation is important too. A greenhouse that’s oriented east-west gets less light than the one that’s oriented north-south.
Now that you know how much light you’ll get placing it where you need to know how much light you desire, and that depends on what you’re building the greenhouse for.
If you’re going to use the greenhouse primarily for plant propagation or starting seeds and transplants in the summer, you want to minimize heat buildup.
So you desire less light than. Try to place it in the eastern or western exposure which gets some shade during the day.
If you have to place it in the southern exposure for some reason, consider providing some shade to control the sunlight amount that reaches the interior, maybe with a shade cloth.
If you want to use the greenhouse for growing in winter and late, or growing your plants to maturity, you’ll want to provide it maximum exposure to the sun then.
Ensure some direct sunlight every day, a minimum of 6 hours. The best orientation in such a case is east-west. This helps to gain more heat from the sun during the winter and create less shadowing in the greenhouse as well.
Afternoon shade from a deciduous tree is a really desirable thing for a greenhouse. In the summer, they can shade the greenhouse during the hottest part of the day.
And in the winter, the leaves will fall and the greenhouse will get the extra light that it needs during the winter.
Though, be aware of placing the greenhouse very close under the tree. There’s a chance of falling branches that might damage the house. Place the house adjacent to the tree, but not too close or directly under it.
If the natural afternoon shade option is not available, you should put the effort to manage artificial shading only for the afternoon.
Accessibility and Utility Supply: You want to make sure that your greenhouse is easily accessible. Don’t forget that you’ll need to move fertilizer, soil, plants, and yourself obviously, to and from the greenhouse. The more accessible it is, the easier your gardening life will be.
A good site for your greenhouse should be sheltered from high winds and easily accessible for you from both your home and garden.
Access to utility supplies like water and electricity are important considerations too. You want to select a site where you easily can ensure fluent water supply.
Also, make sure the electricity line reaches there easily too. You’ll need to run fans and provide artificial heating in need.
Last but not least considerations are good drainage systems and a possibility of storm damage. Just like you ensured water comes in easily, in the same way, ensure it leaves the place easily as well.
If water stays stuck within or around the house, the plants will not be really happy with it, as it can damage them and create a mess in their house.
And greenhouses are prone to damage caused by natural storms. So select a site where the impact of the storm is not severe and you can take quick action to the house in an emergency.
Materials of the Greenhouse: An Important Factor to Consider:
Not surprisingly, the materials used to manufacture a product plays the most important role in its performance. But in the case of greenhouses, the manufacturing element is not only about performance, but also the functionality.
That said, there are no certified ‘best’ materials for greenhouses. There are so many materials that are required to build a greenhouse, so it is hard to know what’s best.
Aluminum, wood, galvanized steel, PVC, fiberglass, glass, polycarbonate, polyethylene, etc. all have their place in the construction of a greenhouse. So it’s your budget and functionality needs that will determine which is best for you.
Green House Coverings
The most important thing for a greenhouse is covering which determines the amount of light that’ll go through to your plants, and the amount of heat the interior will retain.
Additionally, it’s responsible for how your greenhouse looks, it’s security and longevity, ease of maintenance and so.
Some common materials are mostly used for greenhouse covering, like glass, fiberglass, polyethylene, polycarbonate, etc. Each has its advantages, disadvantages. Let’s see what those are.
Glass for Greenhouse :
Glass is the most traditional greenhouse covering, which is mostly preferred for its permanence and beauty. A glass covering is likely to serve you more than 25 years if not accidentally broken, twice as much as any other covering material.
Glass is not really amongst the most efficient materials for retaining heat, because it transmits heat and gets cold quickly, and has a very little insulating value.
Greenhouse glasses need to be double or triple in strength to increase the heating efficiency of it and decrease breakage chances as well which may occur when installing, and in a completed greenhouse as well.
The glass is the heaviest material amongst the ones that are used for covering, so it needs more substantial framing. The frame needs to be sturdy to hold the glass covering.
There are other disadvantages like they don’t diffuse light, so there can be a risk of burning plants. They’re more likely to break than plastic covering as well. This is a considerable issue if you have kids playing basketball nearby, trees nearby, etc.
And installing glass is not a piece of cake as well. Slight deviations from vertical and horizontal frame alignment or settling of the foundation may crack it.
If you’re not confident about your talent in building stuff, you might avoid glass as the frame needs to be very square and rigid in the very first place, and you have to place the glass in the very very carefully.
If you still want to have glass material for its beauty or any other reason, consider hiring an expert to take care of the installation.
Plastics material for a greenhouse :
The distinct advantage of plastics like fiberglass, acrylic sheets, polycarbonate, and polyethylene film is that they’re shatterproof, and they resist hailstone damage.
Also, their flexibility helps a lot. You can flex them to fit over a curved surface, which lets you design the frame in rounder shape if you need it.
And they are available in large sheets, which reduces the possible number of joints in the covering and ultimately reduces the possibility of air leaks from joints.
Fiberglass is considered to be the first of the practical replacements for glass. They come in corrugated sheets or rolls usually.
Fiber Glasses are translucent rather than transparent. They’re see-through so you can see through them but the light transmission is lesser than glass.
Fiberglass creates a virtually shadowless greenhouse by diffusing the light that passes through it. They’re more efficient at retaining the heat than glass, but not as efficient as insulated plastics like polyethylene film or polycarbonate.
At the same time, they transmit less heat into the greenhouse which helps in both winter and summer.
But, fiberglasses is not even close to glasses in terms of sustainability
The fiberglasses used in Greenhouse is UV protected by a coat of some sort of gel that eventually bakes by the sun lasting roughly about 6 years before turning yellow. After this time period, fiberglasses become very unsightly as dirt accumulates among the glass fibers.
Polycarbonate is one of the latest covering options for greenhouses.
The UV treated polycarbonate offers multiple benefits, as they provide much of the clarity of glass and at the same time, they’re stronger, so more resistant to impact than other greenhouse coverings. Also, they’re more resistant to even fire than other plastics.
Polycarbonate for greenhouse covering is available in different thicknesses. Usually, you’ll find single, double, and triple-walled sheets.
They’re different in terms of the amount of heat they’re capable of retaining, so in terms of price, so you can buy according to your needs and budget.
As you can guess, single wall polycarbonate is the most affordable option among all the available versions. This type of polycarbonate is mostly used for its attractive appearance.
But since it is single-layered, it lacks heat retention abilities, the strength, and light-diffusing properties of multiple wall polycarbonates.
Multiple wall polycarbonates are more expensive and come with better properties. They minimize shadow that is optimal for growing plants as they provide your greenhouse with an even diffused light.
They also retain more heat, are stronger against impacts. They’re cheaper in such sense that heating costs get lower with them. So if you’re in cold climates that need frequent heating, these expensive multiwall polycarbonates will pay for themselves.
Polycarbonates are more durable than fiberglasses. They offer up to 15+ years of lifespan. Though it is still not much as glass, it’s a great number considering how lesser they cost than glass.
Polyethylene film happens to be the favorite of commercial growers because of its simplicity of maintenance.
Use it without any hassle for 3 to 5 years then reinstall new poly. The lifespan of polyethylene depends on the poly thickness and UV treatment used though. A difference in these properties also creates a difference in the lifespan of it.
Single-layer polyethylene film is good for simple cold frames. This type of coverage is best suited for greenhouses that are used for starting seeds and other seasonal needs.
In the case of using polyethylene with multiple layers, the space between them is usually inflated by a fan that creates insulated air space. A double layer polyethylene film is more efficient in retaining heat that glasses, which saves roughly 40% in heating costs.
For the downside, polyethylene has a relatively short lifespan than other greenhouse coverings. They’re also more prone to rips and tears and have a translucent appearance much like fiberglass.
Despite these drawbacks, a Polyethylene’s low cost, efficient heat retention, high light transmission, ease of replacement have made it a favorite greenhouse covering option of commercial growers and nurserymen.
All the polyethylene films are not great for greenhouse covering though. Polyethylene sold in many hardware stores is cheap and thin, which is not the best suit for greenhouses.
Polyethylene films that are made for greenhouses are specially coated for protection from UV (ultraviolet) rays, as UV harms unprotected film and make it last shorter.
These polyethylenes have a little cost difference than normal films but influence a considerable difference in performance on your greenhouse. So make sure you buy the specialized ones made for greenhouses.
The common materials for greenhouse frames are galvanized steel, aluminum, wood, plastic, etc. Just like the covering, they have their advantages and disadvantages, and there’s no considerable ‘best’.
It depends a great deal upon what covering you want to use, for how long you want to use it, and where and how you will be using your greenhouse.
Like polyethylene films, galvanized steel is favorite of commercials for frame material, as they are low in cost, comparatively longer-lasting, and they require less framework (thanks to steel’s natural strength), which ensures less shadowing.
The greatest value Steel provides in greenhouse construction is its strength. Due to its natural strength, it requires way less framework and they can afford to be thinner as well, so they ensure minimal shadow and maximum light entrance.
Another major advantage of galvanized steel is its low cost.
So if you buy any steel tube greenhouse, make sure the steel is heavy-duty galvanized steel or stainless steel tubes that’ll protect it from normal humid and corrosive (fertilizer salts) atmosphere of a greenhouse.
Aluminum is the most expensive, and most beautiful and sustainable framing option for greenhouses.
They have a higher initial cost, but they pay for themselves later with the premium look and longest possible lasting as they’ll never rust, rot, or break down from UV rays.
Aluminum promotes much more sturdiness in the frame as well so they can adopt a rigid and weighty covering option like glass.
Usually, these two materials, aluminum, and glass are often used hand in hand to construct the premium greenhouses like Monticello.
Though aluminum frames are sturdier as a whole, they do not have the natural strength of steel.
So it usually requires more bars or parts to build a total frame, which creates a little more shadow inside the greenhouse, as a minor downside of aluminum as a greenhouse framing material.
Try to look for engineered shaped aluminum bars that are designed to increase frame strength, without much more parts needed.
Wood is most commonly used in homemade greenhouses. Nice finished woods bring a very attractive look to the greenhouses. Also, they lose less heat comparing to a similar size metal frame.
Wood frames are often covered with rigid plastic covering. Though a sturdy wood frame can take the load of glass covering and looks premium together.
Due to a greenhouse’s damp atmosphere, wood frames tend to have a limited lifetime before it starts to deteriorate. If you want to use wood for the framing, I recommend Redwood or Cedar as they have a natural resistance to the elements and insects.
I also recommend applying a chemical sealant or stain to the wood periodically as that can help greatly to increase the lifespan of the wood.
Since wood frames tend to be heavier and larger compared to equivalent metal frames, they tend to block the light a bit more and increase the amount of shadow, which is not desirable. You’ll have to live with this drawback if you’re fond of the attractiveness of wood frames.
Plastic has grown in popularity as a framing material over the last 10 to 15 years. They’re low in cost, they’re portable and they are very easy to install.
But plastic is not as rigid as wood or metal so they’re usually used to construct smaller structures that don’t require a lot of strength. Though metal wire supports tend to compensate for what plastic lacks in strength.
Since plastic is even a poorer conductor of heat than wood, they lose a lot less heat comparing to a metal frame, which is a great advantage to get.
Plastic is pretty vulnerable to ultraviolet rays which emerges as a major drawback of it. The UV rays coming from the sun will eventually cause the plastic to deteriorate. Even the UV protection tends to not work so well, though better than no protection.
A plastic material that is protected with UV usually has roughly 20 years of lifespan, which is not bad. Another drawback of plastic is they influence a larger shadow as they are larger than equivalent metal or wood frames.
That was a long piece, wasn’t it? I had to put a lot of effort to write this one but I loved every bit of it. Since gardening is something I’m passionate about, writing anything about gardening feels like a breeze to me.
About picking the best-suited greenhouse for you, I again want to remind you that it’s more about understanding your needs and expectations from the greenhouse, than the house itself.
All the houses I recommended above are great, but not ‘best’ for ‘everyone’ out there. They all kind of falls in the same category in terms of build quality, features, assembly, etc.
Almost every house has got aluminum made from, most use polycarbonate for covering, and assembly is not easy for none of them. What’s the difference then?
Everyone has their own best usage. One’s for entry-level gardeners, one’s for seeds and seedlings, one’s for joining with your house, and so on. You need to understand what you need. That’s the secret for picking the best greenhouse for yourself.
By the way, doesn’t that mean this high-quality aluminum framing, great polycarbonate covering is there in every other greenhouse?
Not really. Some greenhouses claim such in the advertisement but do not stand up to promises in reality. That’s why I handpicked these models from every category that are true to themselves.
Judging the quality of the materials and the overall engineering of a greenhouse is important too, alongside knowing your purpose.
That’ll be all from me. Stay tuned for the next piece.