Sigma Gen II

Sigma Gen II (8.2 ft wide) – The original Sigma Greenhouse design, featuring a classic peaked roof, heavy duty galvanized steel frame, and expandable length for flexible, long term growing in tough climates.



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

    Sigma Urban (Gen II)

    Sigma Urban (Gen II)

    Size: 10' × 13' × 7'
    $2,750 CAD
    $2,950 CAD Save $200 Sale $2,750 CAD
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  • 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 26 (Gen II) Sigma 26 (Gen II)
    160 kg/m² (32 psf)Snow Load

    Sigma 26 (Gen II)

    Sigma 26 (Gen II)

    Size: 10' × 26' × 7'
    $4,250 CAD
    $4,650 CAD Save $400 Sale $4,250 CAD
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  • Sigma 32 (Gen II) Sigma 32 (Gen II)
    160 kg/m² (32 psf)Snow Load

    Sigma 32 (Gen II)

    Sigma 32 (Gen II)

    Size: 10' × 32' × 7'
    $4,950 CAD
    $5,450 CAD Save $500 Sale $4,950 CAD
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All Sigma Greenhouse Sizes

  • Sigma Small
    Sigma Small
    A compact 6.5 ft wide greenhouse with a classic look and heavy duty build. The galvanized steel frame and premium polycarbonate panels stand up to snow, wind, and cold winters, with expandable length to grow as you do.
    View Sigma Small →
  • Sigma Medium
    Sigma Medium
    At 8.2 ft wide, the Sigma Medium offers generous growing space with modular length extensions. Built from galvanized steel and high quality polycarbonate, it performs reliably in harsh weather conditions.
    View Sigma Medium →
  • Sigma Gen III
    Sigma Gen III
    The 9.8 ft wide Sigma Gen III delivers maximum growing space with a reinforced galvanized steel frame and premium polycarbonate panels. Strong, expandable, and built for demanding climates.
    View Sigma Gen III →

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