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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.
Strong and spacious: long-lasting construction, weather-resistant materials, and roomy design.
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:
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.
The only issues I had were some ambiguity in the assembly diagrams. We wanted some additional internal height so we mounted it with raised foundation. Overall very pleased. Still need to fine tune the fit between the door and the window.
Thank you for your feedback. We're working on improving our instructions for a better experience. If you have any questions or need help with the door and window fit, please email us at info@plantagreenhouses.com. Enjoy your greenhouse!
Although I got a late start with the gardening and was a little overwhelmed with the project. It was great to get up each morning and get out of the recliner before my second cup of coffee. Very impressed with everything about the company, your product and your people. I have placed the greenhouse on my property with a Southeast exposure, on the water in SE Alaska. The 65 mph rating gave me pause. But after the construction of the greenhouse was completed, I felt confident with a couple of modifications to bracing the unit would withstand gusts to 85mph. To say the least, I’m one happy customer!
Hi James,
It's fantastic to know that you're enjoying your mornings surrounded by your garden. Happy gardening and enjoying your beautiful view!
So far I love it - we just finished putting it up - have electric to it, heat.... and soon lights. Putting the kit together was definitely a challenge - some views in the instruction manual were hard to really see and understand - so figuring it all out took time - But your customer technical service - is absolutely great - we got what felt like 24 hour support! - weekdays after work and weekends! - we even had additional videos that were shared with us - and these were very helpful - The hardware however for the doors are just falling apart - we asked for one replacement right away - but I can see we will need another already - need to consider better quality hardware - have not installed the vents yet - hoping that will not be too difficult - I would love to give more feedback once I have actually grown in it this winter and into spring -
We installed our greenhouse in 2020 & grow cucumbers, peppers, peanuts, squash, and corn. The greenhouse has extended our season by over 6 weeks and helped to grow hot climate items. The material of the greenhouse is lightweight and strong but it looks so nice. It is a great investment. We love our greenhouse.
We installed our Planta Greenhouse in 2021 and we are planning to raise tomatoes and peppers but have not had it for a growing season yet.
Buying from Planta was ok. Setting it up was a different story. Directions that came with it were minimal. After several calls to the company and a link to a set up video it went better. We suggest you include this link or a DVD when you sell one.
We haven't got a favorite thing about our greenhouse yet. Looking forward to our first growing season using it.
To someone considering buying a Planta Greenhouse, we would say – make sure you have at least one person helping you and request a DVD or link on how to put it together.
| L, (in) | W, (in) | H, (in) | Weight, (lbs) | Quantity | |
| Sigma Base 1 | 62 | 11 | 3 | 46 | 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 | 2 |
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.
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