Grow More greenhouses feature a heavy-duty tubular aluminum frame, superior 10mm triple wall polycarbonate panels, commercial grade hinged doors (1 Dutch door standard on all models), a built-in gutter system, and plenty of roof vents for maximum air circulation. Combine that with the Fast Click system that drastically reduces assembly time and a price hundreds less than any similarly equipped greenhouse, and you have a package that is hard to beat!
Enjoy the light diffusion and beauty that polycarbonate affords without the fear of breakage and drastic temperature changes experienced in glass greenhouses. The beautiful black painted aluminum frame on the Grow More greenhouses will blend in well in any location. Grow More greenhouses are rated for winds up to 70 mph and snow loads up to 25 lbs. per square foot.
The GM13 shipped weight is 661 lbs. and comes packaged in 6 boxes. Dimensions are:
90″ x 13″ x 12″, 104″ x 13″ x 10″, 95″ x 13″ x 9″, 56″ x 41″ x 4″, and 60″ x 41″ x 4″ (x2)
Each extension adds 201 lbs. and 2 boxes. Dimensions are:
96″ x 13″ x 9″ and 61″ x 41″ x 6″
Grow More Greenhouse Features
- Easy assembly
Fast Click system simplifies install and cuts assembly time in half - Long-lasting rustproof design
All aluminum frame & stainless steel hardware
No cheap plastic connectors that break in high winds or aluminum hardware that strips when trying to tighten it! - Large roof vents for maximum natural ventilation
GM8: 4 large 30″ x 26″ roof vents (over 5 sq. ft. each)
GM10: 4 extra large 38″ x 31″ roof vents (over 8 sq. ft. each)
GM13 & GM16: 4 XXL 38″ x 42″ roof vents (over 11 sq. ft. each)
Each extension comes with 2 additional roof vents - Sturdy hinged door with catch
Wide hinged Dutch door made of aluminum and polycarbonate
13′ & 16′ wide models come with 2 hinged doors (1 Dutch & 1 Full)
Model s ending with D have doors on both end walls - Insulated 10mm triple wall polycarbonate
The best mix of strength, insulation, and light transmission in the industry - Expandable
All Grow More greenhouses can be extended to meet your needs
Multiple extensions can be added to any Grow More greenhouse - Rain water collection
Built-in gutters with downspouts - Anchoring
Mounting brackets and hardware are included - Ease of mind
Limited lifetime warranty on frame & 10 years on the covering
Greenhouse Options
Door Option
The GM13 comes standard with double doors on the front end wall. This greenhouse is also available with the same double doors on both end walls for an additional cost.
Ventilation
Grow More roof vents come standard with manual openers. Upgrading to automatic roof vents adds 4 Univent auto openers (1 for each roof vent) which automatically open and close the roof vents based on temperature. If you order extensions with your greenhouse, you will need to purchase Univent auto openers for them separately.
Extensions
Extensions are available for all Grow More greenhouses. Each one adds 6 1/2′ to the length of the greenhouse and 2 additional roof vents. There is no limit to how many can be added. Click here for more information about GM13 extensions.
| Customer Video
Here is a video of a GM13 Grow More greenhouse from one of our customers on Instagram. Take a look at all of the beautiful plants they are growing in the middle of December. |
Grow More Outside Dimensions
| Model | Width | Length | Height | Side Wall | Door |
| GM8 | 8′ 7/8″ | 10′ 8 3/8″ | 7′ 5″ | 5′ | 71″ x 30″ |
| GM8ext | 8′ 7/8″ | 5′ 3 3/8″ | 7′ 5″ | 5′ | n/a |
| GM10 | 10′ 1/2″ | 13′ 3 7/8″ | 8′ | 5′ | 71″ x 37″ |
| GM10ext | 10′ 1/2″ | 6′ 6 3/4″ | 8′ | 5′ | n/a |
| GM13 | 13′ 3 7/8″ | 13′ 3 7/8″ | 9′ | 5′ | 71″ x 77″ |
| GM13ext | 13′ 3 7/8″ | 6′ 6 3/4″ | 9′ | 5′ | n/a |
| GM16 | 16′ 7 3/16″ | 13′ 3 7/8″ | 10′ | 5′ | 71″ x 77″ |
| GM16ext | 16′ 7 3/16″ | 6′ 6 3/4″ | 10′ | 5′ | n/a |
Models ending in “ext” are extensions for that model Grow More greenhouse.
Grow More GM13 Instruction Manual (Current)
Grow More GM13 Instruction Manual (2022 – April 2026)
Grow More GM13 Instruction Manual (2021 & older models)
Grow More GM13D Instruction Manual (2022 – April 2026)
Grow More GM13D Instruction Manual (2021 & older models)
Greenhouse Construction & Operation Tips – Helpful tips to save you from making common mistakes when installing and operating your greenhouse.
How to Build a Foundation – Includes instructions for building 3 of the most common types of foundations for your greenhouse.
Greenhouse Heater Size Calculator – Need a heater for your greenhouse but not sure what size to get? Just use our heater calculator to find out!
