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Grand Gardener 8 ft. x 20 ft Greenhouse Kit - Green Structure & Hybrid Wall Panels

Size
Structure color
Glazing

Never settle for ordinary, the Grand Gardener Greenhouse features a chic barn shape and a windowpane design giving you a gorgeous background for all your plants.

The emphasis on greenhouse safety is evident from the heavy-duty frame to the extremely safe polycarbonate panels. The sturdy, weather-resistant and UV-protected extruded resin frame with its aluminum roof profiles improves both full-insulation and durability. The diffused roof panels are made of 4mm twin-wall polycarbonate, which allows the light to reach your plants at all angles for more even sunlight and growth while preventing plant burn. The side panels are translucent polycarbonate, providing over 90% light transmission while blocking harmful UV rays.

The attention to detail continues through the greenhouse design of the roof which provides ample headroom and more space to the garden to the double doors that make it easy to go in and out, even with large trays of plants. There is also excellent ventilation due to the roof vent, which provides airflow and retains heat when the doors are closed.

We keep it simple with a pin and lock assembly making the Grand Gardener DIY Greenhouse perfect for the growing enthusiast who wants something easy and beautiful!

  • Extra-large, highly resistant, no-tool assembly, safe polycarbonate greenhouse
  • An extra-high ceiling provides an extremely comfortable working environment inside the greenhouse.
  • Built with heavy-duty multi-wall glazing for controlled light exposure and greater insulation
  • Allows maintaining level temperatures and diffuse sunlight
  • Provides up to 100% protection from harmful sun rays (UV)
  • Life-time resilient polycarbonate plastic walls; do not fracture, turn yellow or opacify over time.
  • Easy-to-assemble, DIY greenhouse, sturdy UV protected resin frame, held together with ‘Pin & Lock’ resin connectors.
  • Stylish, classic barn shape design, developed for optimal use of the interior space
  • Built-to-last thanks to outstandingly durable materials
  • Maintenance-free greenhouse
  • Protects your plants from the elements so that you can enjoy an extended growing period.
  • The greenhouses are available in various sizes. Click to find more greenhouse kits.
Model: #702495

Dimensions

A Length 637cm 20'11"ft
B Width 265cm 8'8"ft
C Height 238cm 7'10"ft
D Door Width 118cm 3'10"ft
E Door Height 192cm 6'4"ft

Product Details

Greenhouse Accessories

Fan heater, lighting kits, shade cloth kit, automatic roof vent opener, staging and shelving, plant hangers, trellising kit, and drip irrigation kit are all available for purchase separately. Check out our certified Canopia accessories  

Barn shaped roof

Extra headroom provides a comfortable working environment

Extra support beams

Reinforced structure for added strength

Rating and Reviews

4.88 (12 Reviews)
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Customer Reviews (12)
  1. radiantflux#91 Country: Austria

    More Than Just a Greenhouse

    Not only is this greenhouse functional, but it adds aesthetic value to my garden. The quality of the polycarbonate is outstanding, and it was easy to assemble.
  2. luminarwhiz#18 Country: Austria

    Has held up great for me!

    I highly recommend this greenhouse. Straightforward instructions and very sturdy construction. Has held up great for me!
  3. velvetbyte_42 Country: United Kingdom (UK)

    Perfect for extending the growing season.

    I am so happy I decided to buy this greenhouse. The instructions made assembly simple and the finished product is high quality. Perfect for extending the growing season.

FAQ

No, it is not an option, it cannot be performed.
Yes, it can be disassembled, relocated and reassembled at a different location.
No, it is not an option to get doors on both ends.
It is not possible to install the Lean To Grow House’ door at the other side. It is possible to install only as shown in the instructions.
The greenhouses do not come with a floor or base.
Yes, the polycarbonate panels are high impact resistant and withstand hail.
The warranty for all our greenhouses is for at least 5 years, some for more. The crystal-clear single layer or twin-wall polycarbonate panels maintain their integrity, they do not discolor, opacify, fracture or shatter over time.
Each wall section can carry up to 44 lbs. at most – an entire wall would depend upon the greenhouse’ size.
It can be anchored to a foundation, depending on the greenhouse, some have compatible holes at the bottom of the greenhouse base, and some have their own integrated anchoring. Yes, the greenhouse can be anchored to concrete slab. It can be anchored directly to the ground using ground stakes (ground stakes are not supplied with the greenhouse kits). *Firmly connect the product to a level surface immediately after completion of the assembly. Anchoring this product to the ground is essential to its stability and rigidity. It is required to complete this stage in order for your warranty to be valid.
The Canopia Greenhouse can be used year-round, but there are several factors to consider. The two main factors are weather and plants. What are the plants you want to grow and how much heat or cold can they handle? No matter where you live, greenhouses can be 20-40 degrees hotter inside during the day and at night they will be the same temperature as the outdoors. This is without any supplemental heating or cooling. Depending on where you live, heating and / or cooling your greenhouse can make a difference. If you need to heat or cool your greenhouse in extreme weather conditions, you may want to consider a twin-wall greenhouse such as the Canopia Glory Greenhouse which has a 10mm polycarbonate covering.

Assembly instructions & Certificates for Downloads

Grand Gardener_Series
Roof Vent For Hobby & Grand
Automatic Greenhouse Vent Opener

Foundation

A
Prepare the site

The product must be built on a solid anleveled surface in order to perform properly.

1 - Clear the site
 
2 - Level the ground
 
 
Important We recommend checking for restrictions or covenants for building this product in your area. In addition we advise to check if you need to submit any forms or if any permit is required prior to building the product.
B
Choose your foundation type

For a foundation, we recommend using three material types: Concrete / Pressure-treated wood/ wood deck / Paver blocks.

Option 1: Solid foundation
 
Preferred
Option 2: Solid frame
 
Preferred
Option 3: Firm ground / grass
 
Possible
 

* The size of the greenhouse displayed is for illustration purposes only and may not reflect the size of your greenhouse.

Not possible
C
Anchor to foundation
On a solid foundation / frame
 
 

Secure the product to the foundation of your choice using suitable screws & plugs or masonry anchors (not supplied).

Make sure you have at least 5 cm / 2″ between the product base and the edges of your foundation – on all sides.

On soil / grass
 
 

Secure the product to the ground surface using suitable long pegs (not supplied). Please consult with an expert regarding which fasteners are suitable for other surface types.

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