Sigma 32

Sigma 32

Approx Size: 10' × 32' × 7'

Picture a space in your own backyard that always feels perfect inside, no matter what the weather is like. A garden where gusty winds and icy snow can't affect even the most delicate of plants. A place bursting with new life year-round. A zen-like oasis where you can calmly start your day in the warmth and quiet.


Strong and spacious: long-lasting construction, weather-resistant materials, and roomy design.

  • Wind resistant up to 65 mph for those living in gusty climates.
  • Comes with two doors (one at each end).
  • Withstands a snow load of up to 3 feet (32 psf)
  • Made with a heavy-duty galvanized pipe frame and 6 mm double-wall 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.
  • Access to our private Facebook group to connect with and learn from other greenhouse owners.
Regular price $4,200 USD
Regular price $4,700 USD Save $500 Sale Sale price $4,200 USD
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About Sigma 32

Take backyard farming to the next level with the Planta Sigma 32. This greenhouse was designed with heavy-duty materials that promote 3 or 4 seasons of growing, allowing for multiple harvests every year. In addition, the innovative engineering and tough construction we use means you can harness the power of a commercial greenhouse in an attractive backyard design.

Exact size: 118.1 x 83.9 x 394.49 inches

The rust-resistant galvanized pipe frame means your greenhouse will be standing for years to come. It's tough enough to withstand moderate to extreme weather conditions, allowing your garden to flourish wherever you may live.

The greenhouse comes with:

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

Stay comfortable and cool throughout the day thanks to the spacious design, tall 7ft roof height, and end-to-end ventilation.

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
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Rated 4.8 out of 5 stars
Based on 6 reviews
Total 5 star reviews: 5 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
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QualityRated 5.0 on a scale of 1 to 5
DurabilityRated 5.0 on a scale of 1 to 5
Wind and Snow ResistanceRated 5.0 on a scale of 1 to 5
InsulationRated 5.0 on a scale of 1 to 5
InstallationRated 3.0 on a scale of 1 to 5
Customer ServiceRated 5.0 on a scale of 1 to 5
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6 reviews
  • BF
    Brenda F.
    Verified Buyer
    I recommend this product
    Location Idaho
    Rated 5 out of 5 stars
    6 months ago
    Sigma 32

    So far so good! It's almost finished but not quite yet. It definitely takes time to put it together. I'm super happy with it and will probably be buying another one to add on to it next year. :)

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    6 months ago

    Looking forward to helping you expand with another one next year! 🌱🏡

  • RT
    Robert T.
    Flag of Canada
    Verified Buyer
    I recommend this product
    Location Alberta
    Rated 5 out of 5 stars
    2 years ago
    Buying from Planta was simple and efficient

    We installed our greenhouse in 2021, & in our first year we grew tomatoes, cucumbers, green beans, strawberries, peppers, broccoli, and brussels sprouts. The greenhouse extended our growing season till mid October with minimal added heat latterly. Our favorite thing about having a greenhouse is the ready supply of fresh and healthy food, some of which we preserved and some gifted to friends and neighbors. Looking forward to next season.

    Buying from Planta was simple and efficient. Everything arrived when scheduled and promised and follow up questions were promptly and courteously answered by Nick. We are really happy with our purchase even to the extent of adding a ten-foot extension in our first season. We can highly recommend Planta even here in the Alberta foothills with its strong chinook winds and frequent snow.

    We have very strong Chinook winds in this area and our greenhouse has so far stood up very well despite a close neighbour losing a large tubular shelter to the wind a few weeks ago. We love the automatic windows and with those and our automatic drip irrigation, regular maintenance is minimal.

    Another shout out to Nick for his friendly and prompt attention to our questions.

  • AD
    Adriane D.
    Flag of Canada
    Verified Buyer
    I recommend this product
    Location Nova Scotia
    Rated 5 out of 5 stars
    2 years ago
    We can't wait until we can buy a second greenhouse!

    We installed our Planta Greenhouse in 2021 and we grow vegetables. It changed our growing season by making it much longer.

    My experience buying from Planta was very good. Service and quality are excellent, installation manual could be better. Everything is tight fit. Perfect!

    My favorite thing about the greenhouse is that it's been sturdy in all the storms we get, blocks the sun perfectly, and stops plants from burning. We can't wait until we can buy a second greenhouse. No more outdoor gardens for us here! 

    To someone considering buying a Planta Greenhouse – I think it’s the best thing we ever did. Don't hesitate or buy a cheap take-off. This is good quality at a reasonable price. Could be Dutch!

  • KS
    Keith S.
    Flag of Canada
    Verified Buyer
    I recommend this product
    Location Ontario
    Rated 5 out of 5 stars
    2 years ago
    There is lots of space

    We installed our greenhouse in 2021 and started growing vegetables. The experience buying from Planta Greenhouses was excellent and the greenhouse itself was easy to build and well made. This greenhouse has changed our growing season by extending the fall season – we still haven’t had our spring season yet. To someone who is considering buying a Planta Greenhouse, I would say “you will enjoy it".

  • TW
    Trisha W.
    Verified Buyer
    I recommend this product
    Location Illinois
    Rated 5 out of 5 stars
    6 months ago
    Excellent choice!

    I ordered the sigma 32 model in April ‘23. Fast shipping and no problems with the freight delivery. It is now September and it has been a little summer project putting together. Received all of the hardware with no missing parts, and there are a lot of them. Comes with assembly instructions that seem overwhelming at first, but once you match up your parts it’s not bad. Definitely at least a 2 man job. I live in Illinois and I’m betting this will be warm in to December. It will be exciting to see just how many more months I can get out of the growing season. I still need to purchase the vents at a later time but I love this greenhouse! It is the best value for your money I could find. I look forward to many years of use. With the 5 year warranty, I think it will last 10 years or longer. Thank you for such an awesome experience!!

    PG Profile picture for Planta Greenhouses
    Planta Greenhouses
    6 months ago

    Hi Tisha,

    It's great to know that the assembly went smoothly and that you're looking forward to an extended growing season. We appreciate your kind words and hope you enjoy your greenhouse for many years to come!

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Sigma 32 ships in these boxes:

  L, (in) W, (in) H, (in) Weight, (lbs) Quantity
Sigma Base 1 62 11 3 46 1
Sigma Base 2 77 23 3 92 1
Sigma Polycarbonate Base 83 44 3 55 1
Sigma Extension 77 17 4 58 3
Sigma Polycarbonate Extension 83 44 4 20 4


Planta Greenhouses is dedicated to deliver your order promptly, so you can begin using your greenhouse products right away.

Because greenhouses are packaged in large boxes, they have unique shipping requirements, including: 

  • We will contact you to confirm shipping price, based on your location and order size.
  • Shipping on most orders is between $250 and $450. Deliveries to remote areas may cost 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 will make every effort to ship your order in the fastest possible manner, and by the mode of transportation that you specify; however, in the event of no specific instructions, we will use our judgment and ship the best, fastest and most economical way. We are not responsible for delayed delivery due to conditions beyond our control.
  • We do not ship to PO Boxes, as in most cases you will need to sign for your item. 
  • 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. 
  • Orders placed on weekends and public holidays will be processed the next business day.


Residential Greenhouses

How is the greenhouse anchored to the ground?

Every greenhouse kit comes with optional legs that can be dug directly into the ground. The amount of legs included depends on the greenhouse size.

Are there doors on both ends of the greenhouse?

Yes! All of our Sungrow models come with manual doors and a manual window above the door on both ends of the greenhouse.

What is the width of the door opening?

For our Sungrow models, the door opening width is 800mm or 31.5".

What type of base/foundation is the best for me?

There are several different types of greenhouse bases, information, and pictures posted by our customers on our Customer Stories page and our Planta Facebook page. Additionally, you can learn more about "Types of Greenhouse Bases - With Pros & Cons of Each" on our blog.

Do you have lean-to greenhouses?

Unfortunately, we do not have any lean-to greenhouses available at this time.

Do you make custom size greenhouses?

All of our products come pre-packaged by the manufacturer and can only be customized in length (6.5' extension). However, the height of the greenhouse can also be increased if placed on a base (up to 5ft above the ground)

What polycarbonate panels are used for residential greenhouses?

We use 6mm heavy-duty, double-walled polycarbonate panels with a UV-protected outside layer for our Residential Greenhouses.

What is the frame made of?

The greenhouse frame is made out of heavy-duty galvanized steel.

Roof Ventilation Windows

How many roof ventilation windows are recommended for the greenhouse?

It is strongly recommended to go with an even amount of roof ventilation windows. This is so you can place at least one on either side of the greenhouse. The amount of windows required depends on the greenhouse size, the climate you are in, and the types of plants that will be grown inside the greenhouse.

How do the Automatic Ventilation Windows work?

Our Automatic Ventilation Windows do not require any batteries or electricity. A heat-activated mechanism will open/close the window once a certain temperature is reached.

What are the opening and maximum opening temperatures for the Automatic Windows?

The opening temperature is between 17 °C and 25°C (62.6°F to 77°F), while the maximum opening is at 30 °C (86°F).

Can I add windows for my greenhouse later?

Roof ventilation windows work as an add-on and can be installed only once the greenhouse installation is complete. Windows can be added later as well.

Sigma Greenhouses

What are the snow load and wind resistance on the Sigma models?

Sigma models can hold a snow load weight of 32 psf (160 kg / m2) or 3ft of fresh snow on top of the greenhouse. The wind resistance is 65 mp/h (100km/h).

Sigma Installation

What resources are available to assist with greenhouse installation?

We offer several resources to help you with the installation process:

  1. Bilt App: Downloadable on the Apple Store and Google Play, it provides digitized step-by-step instructions.

  2. YouTube videos: A series of detailed video tutorials to guide you through the installation process.

  3. Printed Manual: Comes included with your greenhouse.

  4. Blog: Explore our blog for valuable insights such as "Expert Advice: 9 Tips For Installing Sungrow Greenhouses With Ease!"

  5. Customer-Only Facebook Group: Connect with other customers for valuable installation tips.

If you still need assistance, our customer service is ready to help via phone or email.

Is there support after purchase?

Absolutely! Our after-sales customer service team is available to answer any questions and support you on your greenhouse journey. You can fill out our contact form or give us a call at 1 (877) 669-1286.

What type of base/foundation is the best for me?

This can vary depending on your location, gardening plans, and desired aesthetic. To better understand the different options available, you can find several different types of greenhouse bases, information, and pictures posted by Planta Greenhouse owners on our Customer Stories page and our Planta Facebook page. Additionally, you can learn more about it on our Greenhouse Bases blog.

Customization Options

Can I add my own vents, fans, heaters, and lights?

Absolutely! The polycarbonate is very easy to work with, and the galvanized steel frame is strong enough to support any additional accessories.

Can I get a longer greenhouse?

Our greenhouses are extendable up to 100ft. Learn more about our extension kits for both the Sungrow and Sigma models.