Sigma 250 (Gen III) greenhouse with transparent panels in a warehouse setting
Sigma 250 (Gen III) greenhouse in a garden with trees and flowers around
Metallic Sigma 250 (Gen III) greenhouse structure in a warehouse setting with shelves and boxes in the background.
Modern Sigma 250 (Gen III) greenhouse with transparent walls and a metal frame, surrounded by greenery.
Metallic Sigma 250 (Gen III) greenhouse with a sliding door in an indoor setting
Sigma 250 (Gen III) Greenhouse in a garden with trees and flowers
Clear polycarbonate Sigma 250 (Gen III) greenhouse in a garden with flowers and plants around
Sigma 250 (Gen III) greenhouse with a sliding door in an indoor setting
Metal Sigma 250 (Gen III) greenhouse structure in a warehouse setting
Arc-shaped Sigma 250 (Gen III) greenhouse with a person inside, surrounded by trees and greenery.
Roll of metal sheet on a Sigma 250 (Gen III) greenhouse with a textured background
Interior of a Sigma 250 (Gen III) greenhouse with curved walls and a door.
Sigma 250 (Gen III) greenhouse in a garden setting with trees and flowers
Metallic framed door for Sigma 250 (Gen III) greenhouses with a latch mechanism
Sigma Medium Urban (Gen III)
Partial view of a Sigma 200 (Gen III) greenhouse with a sliding door
Interior of a Sigma 200 (Gen III) greenhouse with shelves and a ladder.
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Sigma Medium Urban (Gen III)

Sigma Medium Urban (Gen III)

Approx Size: 8' × 13' × 7.5'

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.

Features

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

  • Insulated Doors [NEW] – Helps reduce heat loss and drafts, creating a more stable growing environment and improving energy efficiency.
  • Upgraded Door Handles [NEW] – Smooth, reliable operation with a sturdy grip for easier daily access and long-term durability.
  • Aluminum Polycarbonate Trim [NEW] – Securely locks panels in place along the arch for added strength, better weather resistance, and a clean, finished look.
  • Window/Door Latch [NEW] - Makes the door and window open together.
  • Wind resistant up to 100 km/h for those living in gusty climates.
  • Comes with two doors (one at each end).
  • Withstands a snow load of up to 91cm (160 kg / m²)
  • 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 30 metres - 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.
$2,750 USD
$2,950 USD Save $200 Sale $2,750 USD
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Description Reviews Shipping FAQ

About Sigma Medium Urban (Gen III)

The Planta Sigma Medium Urban (Gen III) 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.

Sigma 250 (Gen III) by Planta Greenhouses EU

Exact Size: 98.4 x 89 x 158.3 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 7.4' (2.26-metre) roof height.

 
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Shipping

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.

FAQ

Residential Greenhouses

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.

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)

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.

What is the frame made of?

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

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 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.

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).