Sigma Urban

Sigma Urban

Rated 4.9 out of 5 stars
19 Reviews

Approx Size: 10' × 13' × 7'

Transform your backyard into a vibrant garden that continues to flourish in the face of sizzling summers and frosty winters. A space where you can explore your green thumb by experimenting with a variety of zesty fruits and spicy peppers throughout the seasons. A tranquil retreat where you can spend time marveling at how your plants grow.


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.
Regular price $2,750 CAD
Regular price $2,950 CAD Save $200 Sale Sale price $2,750 CAD
Sold out

Have questions? Call us 1-877-669-1286
View full details

About Sigma Urban

The Planta Sigma Urban was created for spirited gardeners working with compact urban and suburban spaces. This greenhouse is ideal for 3 or 4 season gardening, so you can harvest homegrown fruits and vegetables throughout the year. Our Sigma collection focuses on sturdy construction and spacious design, bringing heavy-duty greenhouse engineering right to your backyard.


Exact size: 118.1 x 83.9 x 158.29 inches

The tough galvanized pipe frame is rust-resistant and built to last. It's strong enough to handle moderate to severe weather conditions, keeping your garden protected throughout the seasons.

The greenhouse comes with:

  • two doors
  • two manual windows
  • the option to install multiple windows.

This greenhouse is particularly comfortable to work in throughout the day due to the end-to-end ventilation and the unique 7ft roof height.

Snow Load Up To 32 psf (160 kg / m²)
32 psf (160 kg / m²) is equal to 3 feet fresh snow layer or 1.5 feet packed snow layer and is maintenance free in the winter More About PSF
Wind Resistant up to 65 mph (100 km/h)
Sturdy greenhouse construction that resists winds up to 65 mph (100 km/h)
Extendable & Customizable
This greenhouse can be extended with additional expansion kits
Have questions about this product?
Ask a Question


Rated 4.9 out of 5 stars
Based on 19 reviews
Total 5 star reviews: 17 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
Customer-uploaded media carousel. Press left and right arrows to navigate. Press space or enter to open more details.
Slide 1 selected
19 reviews
  • DK
    Daniel K.
    Verified Buyer
    I recommend this product
    Location Ohio
    Rated 5 out of 5 stars
    1 month ago

    Assembly was relatively easy, using the manual and videos! Love the construction, very solid and durable. Recommend highly!

    PG Profile picture for Planta Greenhouses Canada
    Planta Greenhouses Canada
    1 month ago

    Hi Daniel,

    Thank you for taking the time to share your feedback with us!

  • JH
    James H.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    8 months ago
    sigma urban

    it's well engineered and well packed. Lots of bits to put together. If I had a swear box it would have paid for it. As has been said before... instructions arnt the best but help line was great. I used 6 by 6's for the base. Be sure to get the base square. Everything well packaged. Only thing I really had problems with was installing door and window hinges. Some screws could have been a little longer but all in all the greenhouse is great. Hopefully it gets through winter and next year we will be better organized for growing in Nova Scotia..

    PG Profile picture for Planta Greenhouses Canada
    Planta Greenhouses Canada
    8 months ago

    Thanks for your feedback, James!

    We're glad you found it well-engineered and packed. Your pictures are great!

    If you need any assistance in the future, feel free to contact us. Happy growing in Nova Scotia!

  • DB
    Diane B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    8 months ago
    serre urbaine

    Nous l'aimons beaucoup. Le plan d'installation est très utile car il y a beaucoup de pièces. J'aime travailler dans ma serre ,on s'y sens bien.

    PG Profile picture for Planta Greenhouses Canada
    Planta Greenhouses Canada
    8 months ago

    Nous sommes ravis que vous aimiez votre serre!

    Si vous avez besoin d'aide supplémentaire, n'hésitez pas à nous contacter. Bon jardinage :)

  • SK
    Steven K.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    8 months ago
    Glad I bought it

    Perfect size for backyard gardener, lots of interior space and well constructed. Very satisfied with my purchase.

  • TG
    Tess G.
    Flag of Canada
    Verified Buyer
    I recommend this product
    Location Ontario
    Rated 5 out of 5 stars
    2 years ago
    The growing season was significantly extended

    We grow greens and medicinal herbs in our greenhouse, and the growing season was significantly extended and more forgiving of a late start. It is a sleek and simple design. Our buying experience from Planta was great. The assembly process was miserable, but once built, it was a joy to use.

Reviews LoadedReviews Added



Sigma Urban ships in these boxes:

  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 Polycarbonate Extension         83 44 2 20 1


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.
  • White glove delivery service isn't available. The greenhouse components are delivered in multiple boxes, the largest of which weighs 80lbs. The greenhouse will be delivered to your driveway. Please make arrangements to have the package moved to its installation location. 
  • 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.