Sigma 20' Greenhouse
Sigma 20' Greenhouse
Sigma 20' Greenhouse
Sigma 20' Greenhouse
Sigma 20' Greenhouse

Sigma 20' Greenhouse


$3,200.00 Regular price
  • Estimated ship date - 2 weeks
  • Inventory on the way

Works with

Dimensions Approx Size: 10' × 19.5' × 7'
Sidewall n/a
Frame Galvanized Steel - Heavy Duty, Rust-Resistant
Color Silver
Covering 6mm Double-Wall Polycarbonate Panels
Door(s) 2
Roof Vents 0
End Vents 2 - Manual, located above each door
Side Vents 0
Base Can Be Installed with or without a base
Foundation No foundation required
Warranty 5 Year Manufacturer Warranty
Manual Sigma Installation Manual (PDF)

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

Sigma 20 ft. Wide Greenhouse Features:

  • 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 6mm 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.
  • 5-year warranty

Order by Phone

We understand that you may want to talk to an actual person instead of ordering online. Call us toll-free at 1-888-281-9337 to speak to a Sales Representative.


This item ships via Motor Freight Carrier - almost anywhere in the Contiguous United States

Motor Freight Requirements

  • The shipment must be delivered to a business or residence (a PO Box is invalid)
  • The delivery address must be able to accommodate a tractor/trailer as much as 70' in length
  • Someone must be present to receive and unload the shipment from the truck
  • Shipments and/or locations requiring a lift gate, inside delivery, and/or with limited access may incur additional charges by the carrier

Please contact Greenhouse Megastore Customer Service at 1-888-281-9337 if you have any questions about delivery to your specific address so we can ensure the smoothest delivery possible!

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