Sigma 20
Sigma 20
Approx Size: 10' × 19.5' × 7'
Imagine a garden filled with life yet untouched by time. A space where you can harvest heat-loving vegetables while a piercing winter storm is raging outside the door. A stable environment where vine-ripe tomatoes and succulent strawberries will thrive. A lovely quiet space to spend away from work, kids, and the chores of life.
Features
Strong and spacious: long-lasting construction, weather-resistant materials, and roomy design.
- Wind resistant up to 65 mph for those living in gusty climates.
- Withstands a snow load of up to 3 feet (32 psf)
- Made with a heavy-duty galvanized pipe frame and strong polycarbonate panels
- Arched shape - so the wind, snow, and hail just slide off the sides.
- Extendable beyond 100ft - so you can expand your greenhouse when you're ready.
- Maintenance-free means you have more time to focus on your garden.
- We offer a 5-year warranty because our greenhouse is heavy-duty and long-lasting.

















- Description
- Reviews
- Shipping
The Planta Sigma 20 is an urban gardener's dream come true. The quality heat-capturing materials allow for 3 or 4 season gardening, meaning you'll be able to harvest delicious fruits and vegetables beyond the outdoor growing season. Additionally, the rounded design is incredibly spacious, giving you the room to make the most out of your backyard garden.

Feel confident knowing that the rust-resistant galvanized pipe frame is tough enough to withstand a variety of severe weather conditions – keeping your garden safe and sound throughout the year.
The greenhouse comes with:
- two doors
- two manual windows
- the option to install multiple windows.
The Sigma 20 greenhouse is extremely pleasant to work in throughout the day due to the end-to-end airflow and the distinctive 7ft roof height.
Greenhouses are amazing products, and they require special shipping and handling. That is the reason, we have been working diligently over the past year to secure preferential shipping rates for our customers. Most shipments across Canada and the US are between $250 and $450.
- We will contact you to confirm shipping price, based on your location and order size.
- Shipping on most residential greenhouse orders is between $250 and $450, customers in remote areas may need to pay extra.
- When you place your order, please make sure to enter the correct Phone and Address at checkout. You will be contacted by phone before the item is shipped. We cannot be responsible for deliveries to incorrect addresses.
- As part of the delivery process, we require a contactable telephone number (for the courier company to contact you) before the item is shipped.
- We do not ship to PO Boxes, as in most cases you will need to sign for your item.
- Orders placed on weekends or public holidays will not begin processing until the next business day.
Featured
The package for Sigma 20 10' × 19.5' × 7 ' consists of the following boxes:
L, (in) | W, (in) | H, (in) | Weight, (lbs) | Quantity | |
Sigma Base 1 | 80 | 41 | 7 | 73 | 1 |
Sigma Base 2 | 76 | 20 | 2 | 77 | 1 |
Sigma Polycarbonate Base | 83 | 44 | 3 | 55 | 1 |
Sigma Extension | 77 | 17 | 3 | 42 | 1 |
Sigma Polycarbonate Extension | 83 | 44 | 2 | 20 | 1 |



