Top 7 Best Greenhouse Kits Reviews (2021 Updated)

best greenhouse kits reviews

Growing vegetables in your backyard is healthy for your physical and mental health and more sustainable for the environment. Whether you love enjoying fresh veggies on the table or love taking care of tiny plants, the best greenhouse kits will help you start this hobby with more joy and less wasted budget than hiring a gardening service to do this installation for you.

Need some clues to start? Let’s explore the top 7 favorite greenhouse kits that millions of gardeners worldwide are using.

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Top 7 Best Greenhouse Kits 2021

Product ImageProduct NameFeaturesPrice
Quictent Upgraded 20’x10’x7’ Portable GreenhouseBest greenhouse for cold climatesSee latest Price
KING BIRD 10’x6.6’x6.6’ Upgraded Large Walk-in GreenhouseAffordable for startersSee latest Price
Palram HG5510 Hybrid Hobby Greenhouse 6'x10'x7'Withstand winds up to 56 mphSee latest Price
Exaco Junior Victorian J-VIC 24 96 Square Foot GreenhouseBest glass greenhouse kitSee latest Price
Rion EcoGrow 2 Twin Wall Greenhouse 6'x10'Comfortable Barn shape designSee latest Price
EAGLE PEAK 6.6’x3.3’x6.9’ Outdoor Lean-to Walk-in GreenhouseBest for home useSee latest Price
Worth Garden 5 Tier Mini GreenhouseBest for indoor mini spaceSee latest Price

In-depth 7 Top Rated Greenhouse Kits Reviews

I don’t include any wooden greenhouse kits in this list due to their minus points. For example, rot potential, maintenance effort, high attractiveness to insects and harmful bugs, etc.

1. Quictent Upgraded 20’x10’x7’ Portable Greenhouse – Best greenhouse for cold climates

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Quictent Upgraded is the best commercial greenhouse kit for serious gardeners. This greenhouse is suitable for growing big plants and vegetables with spacious dimensions of 20 x 10 x 7 feet.

This portable greenhouse is designed with utmost durability for your permanent planting purpose. The main frame is made of powder-coated galvanized steel and reinforced with middle rails, allowing it to stand against all harsh weather conditions. Besides, it has 10 bases and 20 stakes to keep the tent strong-resistant against snowstorms and big winds.

Why I rated this Quictent Upgrade greenhouse your #1 choice for winter? Because you can protect your veggies from cold water and snow while allowing the natural sunlight inside for their optimum growth.

  • First, the two-layered polyethylene cover protects your crops against weather elements. Since it is tear-resistant, you can use it outdoors for years with no extra budget for replacement.
  • Second, on the greenhouse’s roof, there are 3 rows of round crossbars to prevent the accumulation of ice, snow, and water.
  • Third, U-shaped stakes are on the ground to keep the greenhouse stand firmly and lessen the wind obstruction.

On summer days when the outer temperature is high, can your plants grow happily inside this tent? Absolutely YES! The greenhouse cover has a reinforced transparent mesh layer inside to allow 85% sunlight to come in while preventing bugs and insects.

This mesh also helps maintain good ventilation for the garden. On two sides of the greenhouse, there are 10 exhaust windows with all-sided Velcro to keep the inner temperature warm in winter.

You can enter the house from either the front or the rear roll-up doors. Both these two doors have a two-sided zipper and a mesh vent for air circulation. You can close these doors on humid days (for example, long rainy days) to not affect your plant transpiration.

This greenhouse kit comes ready to assemble with all the essential parts and a user manual. However, you might need the help of your friend or a family member to set it up due to its large size.

Pros Cons
  • Suitable for commercial planting purposes
  • Spacious for big plants
  • Two-layered PP cover with mesh for excellent protection and ventilation
  • Two-sided zipped entrances
  • Expensive
  • Need help on installation

2. KING BIRD 10’x6.6’x6.6’ Upgraded Large Walk-in Greenhouse – Affordable for starters

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Temperature and humidity control are two common mistakes of many gardening starters. This small greenhouse kit from King Bird will help you maintain a perfect mini-ecosystem for your plants.

Two reasons that make this greenhouse appropriate for people with little to no experience in gardening are its price tag and size.

This greenhouse has a smaller size of 10 x 6.6 x 6.6 feet, and is much more affordable than the above commercial one. Yet, it is spacious enough to grow some simple plants like radishes, tomatoes, strawberries, lettuce, potatoes. So, you can start growing fresh veggies for family dinners without spending too much.

Small as it might seem, this KING BIRD greenhouse offers a similar shape and construction to the premium Quictent Upgraded greenhouse. Apart from the sturdy 0.7mm galvanized steel frame, there are 8 poles at the bottom, 18 stakes, and 4 ropes to reinforce the entire house’s structure against strong winds.

Controlling temperature and humidity makes it effortless, thanks to its clever design. Each entrance door has two layers – 1 PE door and 1 screen door with tear-resistant seams and independent zippers. Besides, there are 6 roll-up screen windows with Velcro and ties.

On hot summer days, you can open several or all these doors and windows for maximum ventilation. The mesh layer will protect your lovely plants from uninvited guests like pets, wild animals, insects.

Another notable plus of this portable greenhouse is that it comes with a waterproof 140g/m2 PE grid cover with UV protection level 6. While most UV covers only last from 3 to 6 months and have UV protection level 3, this cover from King Bird can last for one year under continuous use.

This cover also has a PE insulated layer to avoid heat loss at lower temperatures. The cover’s size perfectly fits the main frame for enhanced wind resistance, making this greenhouse ideal for winter days.

Pros Cons
  • Affordable for starters
  • Sturdy construction to withstand all harsh weather conditions
  • Waterproof 140g/m2 PE grid cover with UV protection level 6
  • Poor instruction

3. Palram HG5510 Hybrid Hobby Greenhouse 6’x10’x7′ – Withstand winds up to 56 mph

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A polycarbonate greenhouse like Palram HG5510 is a great idea to show the beauty of your plants and flowers while protecting them from weather elements.

Each greenhouse kit comes ready for assembly, including an adjustable roof vent, aluminum frame, lockable hinged door with magnetic catch, rain gutters, polycarbonate panels, and a galvanized steel base.

With more than 30 years in manufacturing polycarbonate panels, Palram greenhouse kits like HG5510 are a reliable choice for protecting and maintaining healthy growth for your plants while maintaining a crystal-clear appearance for years.

Its lightweight aluminum frame provides solid support for the whole house while firmly standing against the test of time and humidity with excellent rust resistance. Depending on your greenhouse’s height, you can extend this base from 6 feet to 10 inches from the ground to the roof.

Furthermore, the 4mm twin-wall roof is made of high-grade polycarbonate, which is unbreakable. This greenhouse can withstand winds up to 56mph when going with the Nature Series anchor kit from Palram. It can support a maximum snow load of 15.4 pounds per square foot.

Not merely for decorating purposes, the crystal look of this greenhouse also plays a vital part in the optimal growth of your greenies. The side panels allow up to 90% light transmission, while the roof allows up to 70% light transmission to your plants while protecting them from 99,9% harmful UV rays.

Thus, your plants can always absorb enough light while avoiding damages from the ultraviolet rays of the Sun.

Pros Cons
  • Withstand winds up to 56 mph
  • The aluminum frame can extend from 6 feet to 10 inches
  • Need at least 2 people to install it

4. Exaco Junior Victorian J-VIC 24 96 Square Foot Greenhouse – Best glass greenhouse kit

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When picking up the best quality greenhouse kit for your backyard, glass greenhouses like Exaco Junior Victorian are more expensive and heavier but more durable and beautiful than cheap plastic ones. Therefore, you can install it one time and use it for a lifetime. This greenhouse offers you a planting area of 96 square feet.

This Junior Victorian, as well as the Junior Orangerie greenhouse, are in the Helios product line of Janssens, a high-end Belgium glass greenhouse manufacturer with over 30 years of experience. Janssens is also a well-known provider of luxury greenhouses in Europe.

This first-class glass greenhouse is not only fashionable but also one of the most sturdy and reliable houses for your plants. The 4mm safety glass and the 3-inch high-foundation aluminum frame bring old-fashioned English style to your flowers and plants while protecting them from damages.

As stated by the manufacturer, its aluminum profiles are thicker, more extensive, and sturdier than cheap conventional competitors on the market. Its two roof windows are held in place with rubber seals for better insulation while others only use cheap metal clips.

A minor drawback of the Junior Victorian, as well as other glass greenhouses, is its weight. This greenhouse weighs 807.4 pounds. Thus, it is hard to install it at first.

Pros Cons
  • Excellent design from Belgium
  • Glass panels provide better insulation than plastic ones
  • Two roof windows with premium rubber seals
  • Heavy, hard to assemble

5. Rion EcoGrow 2 Twin Wall Greenhouse 6’x10′ – Comfortable Barn shape design

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Budgeting is a common problem for first-time gardeners. This heavy-duty greenhouse kit includes everything you need in larger commercial plant houses but at a smaller size and a more reasonable price tag.

The 4mm twin-wall roof and 6mm twin-wall side panels of this Rion EcoGrow greenhouse are designed to provide your plants with 100% protection from harmful UV rays.

Plus, they also offer your newly-grown plants superior safety, light diffusion, and excellent heat insulation. Its main frame is manufactured with resin – a versatile substance that is often used for making castings, floorings, countertops, etc.

This greenhouse kit comes with detailed instructions, so you can assemble it with a pin and lock connector without hiring professionals or special tools. However, there are only diagrams and no words in the instruction. If it is your first time assembling a greenhouse, you will need to spend more time making every step clear.

Pros Cons
  • Durable resin frame, roof, and side panels
  • Budget-friendly
  • Easy assembly
  • The instruction has only diagrams and no explanation in words

6. EAGLE PEAK 6.6’x3.3’x6.9’ Outdoor Lean-to Walk-in Greenhouse – Best for home use

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There are three important benefits of a home-attached greenhouse like this item from EAGLE PEAK.

  • First, your plants can easily access water and power for healthy growth.
  • Second, you can extend their growing season while enjoying the green view from inside.
  • Third, this greenhouse is cheaper than an independent one, making it the best greenhouse for home use.

This mini lean-to greenhouse kit has a durable powder-coated steel frame and an extended UV and water-resistant PE shelter. You can add soil and rocks on the cover’s edges to improve its stability.

You can walk into the house to take care of your plants daily from either of its two roll-up zipper doors. Apart from its entrance purpose, these doors can also help you control air circulation and humidity for the inside plants or keep them away from insects and bugs.

Another reason that made me include this kit in my favorite list is because it comes with a 3-tier flower rack for no extra cost. If you are a flower addict, you might love this freebie.

Pros Cons
  • Easily attached to your house/garage
  • Lightweight; easy assembly
  • Free 3-tier flower rack
  • Need to prepare an additional heater to protect your plants in subzero weather
  • Too small for big plants

7. Worth Garden 5 Tier Mini Greenhouse – Best for indoor mini space

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Whether you only need a mini space to grow small plants or need a low-budget decoration corner inside your house, this 5-tier mini greenhouse from Worth won’t disappoint you.

This mini rack weighs only 11.92 pounds and has dimensions of only 75 x 27 x 19 inches. Thus, you can assemble it in a few minutes with no extra tools or devices. You can put all your favorite plants on this rack without taking much space in your house. When not in use, you can fold it up and store it in your basement or garage.

Although it is an indoor greenhouse kit, you can put it outdoors on your balcony, patio, deck, or encased porch. This rack is manufactured of a rust-resistant steel frame with a 0.12mm PVC cover for maximum protection on rainy or sunny days. Each tier supports a maximum weight capacity of 23.4 pounds.

Pros Cons
  • Lightweight and compact
  • Foldable for easy storage
  • Can be used indoor or outdoor
  • Not provide enough plant protection for serious gardeners

My Top Pick 

It’s hard to define a winner among these 7 best greenhouse kits since you and I might have a different opinion of our dream greenhouses. You can pick up a greenhouse depending on your usable area, your local area’s regulations, whether you are growing plants from seeds or mature plants, your budget, and some other factors.

As a general comparison, Quictent Upgraded Portable Greenhouse is my best choice for all-year gardening. Although it is mentioned for professional gardeners, it provides exceptional protection for your beloved flowers, fruits, and vegetables inside.

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