Building a greenhouse is a lofty dream for some, especially when it comes to having the right amount of space and the green thumb to go along with it. One way to ease into the process of having a greenhouse is to start with a kit you can build in your own backyard. With a range of sizes and prices available, you can easily find greenhouses that meet your needs and offer you the chance to grow a variety of plants you would otherwise never be able to cultivate. Take a look at some of the best greenhouse kits available today.
9 Best Greenhouse Kit Comparisons
|ShelterLogic GrowIT Greenhouse-In-A-Box||Check The Price|
|Palram Nature Harmony Greenhouse||Check The Price|
|Abba Patio Walk-in Greenhouse||Check The Price|
|Outsunny Polycarbonate Walk-In Garden Greenhouse||Check The Price|
|Grandio Element Walk-In Greenhouse||Check The Price|
|ShelterLogic GrowIT High Arch Greenhouse||Check The Price|
|Shearson Greenhouse||Check The Price|
|Farm House Greenhouse||Check The Price|
|Spring Gardener Greenhouse||Check The Price|
How to Decide on a Kit for You
Determining which greenhouse kit is going to work best for you can be daunting since there are hundreds of them available today; all best rated, best selling, and top choice. And with bargain options as well as expensive, professional models, you’ll want to understand what each one offers and why that’s important. Start by considering what values you have and what you’re looking to do as you consider your greenhouse options.
A Starter Greenhouse or a Grower?
Do you love the benefits of gardening? Are you thinking about starting a greenhouse due to weather and other constraints that make it difficult to maintain a garden full of variety? Does your climate keep you from growing the flowers and plants you find most satisfying? Or are you already a heavy gardener who wants to expand your capabilities into a self-sustaining home and need the extra power offered by a greenhouse to grow everything you need to eat fresh? These sorts of questions arise and help you decide the size and style of your greenhouse.
Sizing is important for two reasons:
- You have to choose a greenhouse kit that fits comfortably in your available area. If your garden area is very small, you should make sure not to oversize your greenhouse, or you won’t be able to fit it in the yard.
- Size actually has a lot to do with not just pricing but the activity. You can start as small as a 4’x4’ walk-in greenhouse or, if you have space, opt for something much larger. Just remember that however large your greenhouse, you’ll have to assure that you have everything set up properly and the time and interest to maintain everything inside.
Choosing the panel type for your greenhouse is important because opaque panels offer different benefits than clear panels. For example, if you’re starting seedlings within the greenhouse and plan to move them out to the garden, you should consider something like a clear polycarbonate panel, since this creates an environment with direct lighting that promotes sprouting.
On the other hand, diffused light helps mature plants better, so if this is your goal, you should think about a twin- or multi-walled polycarbonate panels to assure you’re getting that diffused light for your plants. If you’re looking to both start new plants and mature them, there are also options for semi-diffused light that can be a compromise for your purposes. Still, it’s essential to determine what your purpose is as you search for the right greenhouse kit to purchase.
Another consideration is your local climate. If you have a heavy winter, you’ll want to have greater insulation in your greenhouse to assure that the bitter cold doesn’t seem in. On the other hand, you may have a very mild winter that doesn’t require additional insulation and can weather the storms, so to speak. Be generous; if you feel there’s a chance that your winters are too harsh for a standard insulation and design, look into something made to withstand your particular climate.
While greenhouses may appeal to you as something beautiful to erect in your yard, your neighbors may not feel the same. Be sure to measure the area where you plan to put the greenhouse and mark it off with some sort of zoning tape so that you can try to picture the structure in the space. Questions you may want to consider include:
- How does the addition of the greenhouse here affect my ability to enjoy other activities in my yard?
- Does the greenhouse obstruct a particular view in a way that would displease my neighbors?
- Does the structure interfere with my view?
- What are the zoning limitations in my city and neighborhood regarding outbuildings? Does it have to be below a certain size or height?
- Do I need a permit before putting up my greenhouse?
- Is this the best place to locate my greenhouse, or should I consider multiple spots to determine the best?
Once you’ve answered these questions, you’ll be better prepared to choose a greenhouse that meets your needs, doesn’t get in the way, and adheres to any regulations you have to follow in order to keep the red tape at a minimum.
Perhaps as you narrow down the field to a few specific greenhouse kits you’ll be choosing from, you should take the manufacturer into consideration more closely. You’ll want to make sure that the provider of your greenhouse offers good customer service and holds to high standards with their products. You should check the warranty information and the reviews from other buyers to assure that you aren’t diving in headfirst to something you’ll later regret, should something go wrong, and you have to return to the company with a complaint or a repair.
The 9 Best Greenhouse Kits Reviews
ShelterLogic GrowIT® Greenhouse-In-A-Box
- Warranty: 1 year limited
- Dimensions: 6’ x 8’ x 6.6’
- Weight: 51.75 lbs
- Materials: Polyethylene 5.5 oz
Shelterlogic provides a basic, easy to assemble greenhouse in a box kit offered in three sizes to fit your specific needs. Made from a durable polyethylene, it is designed to protect your tender plants and allow for consistent lighting using a ripstop water proof, and UV-treated cover. The steel frame is both durable and strong and allows for a snug cover fit.
- Durable and easy to put together
- Ratchets provide a snug cover fit
- Easy to control temperature with roll up sides
- Once the cover wears out a replacement is not offered for separate purchase
- Best to anchor down with blocks as it may not stay put
Palram Nature Harmony Greenhouse
- Warranty: 5 years
- Dimensions: 97.2 in x 72.8 in x 81.9 in
- Weight: 33.5 pounds
- Materials: powder coated aluminum (frame), galvanized steel (base), polycarbonate (panels)
If you’re looking for a simple, easy assembly solution that will allow you to start growing your seedlings into full-grown plants, the Palram Nature Harmony Greenhouse is a great option. It’s got a powder-coated aluminum frame and clear polycarbonate panels that easily slide together, making the assembly process pretty simple. It’s a good size for most backyards, measuring 6’ x 8’ and tall enough to walk in without being an eyesore to the neighborhood. The base is a rust-resistant galvanized steel that withstands the elements and gives the entire structure solid support.
- Comes with stakes for additional anchoring
- Has a vent panel for temperature control
- Easy visual instructions
- Difficult to hang plants inside
- Better to have 2 people for assembly
Abba Patio Walk-in Greenhouse
- Warranty: 1 year, limited
- Dimensions: 10’ x 20’ x 9.4’ (peak) / 6.6’ (sides)
- Weight: 174 pound
- Materials: Rust free powder coated steel (frame), reinforced transparent PE cover (panels), mosquito netting (windows)
If you have a larger space to work with and are interested in expanding what you grow in your garden, you might want to consider the Abba Patio 10 x 20-Ft Walk in and Fully Enclosed Lawn and Garden Greenhouse. AT 10’ x 20’, this much larger option offers a more cost-effective way to get the results you want, utilizing transparent fabric PE that’s waterproof and UV-treated over a steel frame. The manufacturer is actually an expert in all things patio and outdoors, from awnings and canopies to greenhouses, so you can trust their product will be sturdy and satisfying. You don’t have to worry about stability with foot plates and pegs included, and zipper doors, as well as mosquito-netted window, allow easy access for you and excellent ventilation without access for pests.
- Sensible, simple design
- Pegs for grounding included
- Treated for UV
- 6 roll-up windows have netting against pests
- Steel polls heat to the point of possibly melting the fabric in hot weather
- Difficult to understand instructions for assembly
Outsunny Polycarbonate Walk-In Garden Greenhouse
- Warranty: 90 days, limited
- Dimensions: 87.25” x 74.25” x 74.25”
- Weight: 60 pounds
- Materials: powder coated aluminum alloy (frame), UV resistant polycarbonate (panels)
For a starter greenhouse in a small space, especially on a budget, the Outsunny 6’L x 6’W x 7’H Polycarbonate Portable Walk-In Garden Greenhouse is a great option. With a choice of 6’ x 4’ or 6’ x 6’ (discussed here), you can fit this portable greenhouse in almost any corner of your outdoor space without compromising your ability to enjoy the rest of your yard. UV resistant paneling coupled with steel framing make this greenhouse durable and long-lasting, despite its low price. The sliding door is convenient to use and leads to even less space required to open the greenhouse for entry and exit. While this isn’t considered a heavy duty greenhouse, it’s sturdy enough to get the job done and is excellent for simply assuring you can stay in the soil year-round without trouble from weather and elements.
- Sliding door for easy entry and space saving
- Galvanized base for more support
- Rain gutter for collecting natural water for plants
- Panels are not reinforced
- Not an extensive warranty
- Instructions are difficult to follow
Grandio Element Walk-In Greenhouse
- Warranty: 10 years (panels), Lifetime (frame)
- Dimensions: 95” x 72” x 85”
- Materials: powder coated aluminum (frame), twin wall UV protected polycarbonate (panels)
There are multiple reasons to consider the Grandio Element Walk-In Greenhouse Kit, especially if you have limited space and a difficult climate with lots of wind. First, you have two options for sizes, – 6’ x 4’ or double that at 6’ x 8’, meaning you can fit it into your space and overall needs. In addition, you have a choice of anchor types, which allow you to tailor the installation to your environment and climate needs. However, perhaps the best reason to consider spending a little more on a greenhouse for this particular product is that you get an incredible warranty on the product. There are double sliding doors for ease of use and a high-end appearance, and the polycarbonate panels provide an optimal amount of insulation all year round, with roof vents for temperature regulation.
- Choice of anchor types for application
- Excellent warranty (and the service to back it)
- Has extension kits available for growth
- Assembly tools included
- Base sold separately
- A bit pricey
ShelterLogic GrowIT High Arch Greenhouse
- Warranty: 1 year, limited
- Dimensions: 155.5” x 143.5” x 239.5”
- Weight: 101 pounds
- Materials: powder coated steel (frame), triple-layer polyethylene fabric (panels)
Not only is the rounded design of the ShelterLogic GrowIT High Arch Greenhouse aesthetically appealing – it’s height is airy and welcoming. The fabric covering is translucent and UV protected so that heat and sunlight get to your plants appropriately without the harmful effects of UV rays, and the steel frame is heavy duty for continued performance throughout the years. The large size means you have room for delicious vegetables as well as gorgeous blooms if you want, and the auger anchors included will assure that you never have to worry about the wind blowing over your precious nursery. The design of the space allows you to grow even the tallest of plants while providing the right diffused lighting for smaller shrub growth.
- Powder coated heavy duty steel frame
- Designed for less water use and less maintenance
- Polyethylene fabric is 3 layers and heat treated for performance
- Height may not be acceptable for some neighborhoods
- Zip up sides rather than a door
- Warranty: 5 years
- Dimensions: 82” x 73” x 122”
- Weight: 99 pounds
- Materials: Rust-resistant aluminum (frame), polycarbonate and twin wall polycarbonate) panels
If you’re thinking about something small but a little more roomy than some of the options already shown here, you can opt for the Shearson 6’ x 10’ Greenhouse. This particular greenhouse is great for any plants because it uses both types of panels – the clear polycarbonate walls for bright light and the twin-wall roof overhead that blocks UV rays and helps diffuse light. It integrates rain gutters and a downspout so you can water naturally and conserve, and assembly is quick and easy with a panel slide and lock system. The aluminum frame is rust resistant and virtually maintenance free. The door is lockable for safety, and the roof vent is adjustable so that you have just the right amount of ventilation for your growth. It even withstands a load of snow.
- Rain gutters and downspout for natural watering
- Dual types of panels
- Locking door
- No written instructions
- Anchoring kit is separate
- Boxes are very heavy upon delivery
Farm House Greenhouse
- Warranty: 1 year, limited
- Dimensions: 9’ x 9’ x 8’
- Weight: 68 pounds
- Materials: polyethylene film (panels), plastic/fiberglass/PVC (frame
The Farm House 9’ x 9’ Greenhouse offers a bit of a different option. Aside from a different dimension set, you also have the lightweight construction of PVC that is still sturdy without the heavy element of steel or aluminum. That means it’s portable, so if you decide to move, it can come with you. The polyethylene film that acts as the panels makes it even easier to transport and care for while still providing year-round use with ventilation and insulation, as well as being UV resistant. The wall vents are easy to reach and use, and setup is a breeze. If you decide to expand your greenhouse area, you can purchase a second one and simply construct and zip together with the existing one for one continuous look.
- Easy to expand
- Lightweight and portable
- Ventilation on the wall, not ceiling, for easier access
- Not as permanent as steel or aluminum
- May have trouble with heavy snow and ice
Spring Gardener Greenhouse
- Warranty: 1 year, limited
- Dimensions: 10’ x 20’ x 9’
- Weight: 178 pounds
- Materials: polyethylene film (panels), steel (frame)
With the Spring Gardener 10’ x 20’ greenhouse, you get the best of both worlds – a larger space with a reasonable price. The fabric is UV protected, and walls, doors, and window ventilation are all roll-up and zipper enabled for ease of use. The valances are decorative, matching the frame, and it’s a good choice for an enthusiast who wants to grow year round without worrying about exorbitant costs. The translucent fabric offers diffused light and warmth to aid in thickening and maturing while also reducing the chance of burning from direct light.
- Straightforward and easy assembly
- Snaps and Velcro to aid in ease of use
- Cost efficient
- Withstands heavy rain, snow, and wind
- Snaps sometimes fail
- Requires 2 people to assemble all parts
It’s hard to define a clear winner since different people have a different idea of what they need a greenhouse for. Depending on the size of your usable area, the regulations in your neighborhood, whether you are looking to grow seedlings or mature other plants, and a number of other factors, you may change your mind about what you really want to purchase.
However, as a general comparison, we’d have to declare the Palram Nature Harmony Greenhouse as the winner. It’s a great size for starting out and fits almost anywhere at 6’ x 8’, and it’s reasonably priced at a mid-range amount. It also has a great 5-year warranty. It comes complete with the anchoring stakes, is relatively easy to assemble, and is weather resistant for a good, long use year after year. It’s also short enough not to anger onlookers by blocking the view while also being tall enough to walk in and enjoy.