Sigma 20 Greenhouses

Explore all 20 ft long Sigma Greenhouse models in one place. Compare Gen II, Gen III, Medium, and Small versions to find the ideal width and layout for your growing space, all with the same 20 ft length and durable, all season construction.

  • Sigma 20 (Gen II) Sigma 20 (Gen II)
    160 kg/m² (32 psf)Snow Load

    Sigma 20 (Gen II)

    Sigma 20 (Gen II)

    Size: 10' × 19.5' × 7'
    $3,500 CAD
    $3,800 CAD Save $300 Sale $3,500 CAD
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  • Sigma 20 (Gen III) Sigma 20 (Gen III)
    160 kg/m² (32 psf)Snow Load

    Sigma 20 (Gen III)

    Sigma 20 (Gen III)

    Size: 10' × 19.5' × 7'
    4.7
    Rated 4.7 out of 5 stars
    36 Reviews
    $3,900 CAD
    $4,200 CAD Save $300 Sale $3,900 CAD
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  • Sigma Medium 20 (Gen III) Arc-shaped Sigma 2.5x6 (Gen III) greenhouse with a person inside, surrounded by trees and greenery.
    160 kg/m² (32 psf)Snow Load

    Sigma Medium 20 (Gen III)

    Sigma Medium 20 (Gen III)

    Size: 8' × 20' × 7.5'
    $3,800 CAD
    $4,100 CAD Save $300 Sale $3,800 CAD
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  • Sigma 200 (Gen III) greenhouse with transparent panels on a grassy area in front of a house. Sigma 2x6 (Gen III) greenhouse in a field with trees and sky in the background by Planta Greenhouses EU.
    160 kg/m² (32 psf)Snow Load

    Sigma Small 20 (Gen III)

    Sigma Small 20 (Gen III)

    Size: 6.5' × 20' × 8'
    $3,700 CAD
    $4,000 CAD Save $300 Sale $3,700 CAD
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