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Grandio Greenhouses Summit 12x20

Order today. Estimated delivery Jun 20–Jun 25

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$7,244.00
$6,899.00
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★★★★★ 5.0 · 280+ reviews
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Product Description

Key Features

Heavy-Duty Construction & Rust ProofHeavy-Duty Construction & Rust Proof

Exceptional Year-Round InsulationExceptional Year-Round Insulation

Impressive 9.25' Peak Height Maximum Headroom & Vertical SpaceImpressive 9.25' Peak Height Maximum Headroom & Vertical Space

Advanced Ventilation & All-Weather PerformanceAdvanced Ventilation & All-Weather Performance

Wide, Lockable, Double Sliding DoorsWide, Lockable, Double Sliding Doors

Explore the Grandio Summit 12x20 Hobby Greenhouse Features and Benefits

Welcome to the Grandio Summit Greenhouse

This is the ultimate large-format greenhouse for serious gardeners — built commercial-grade yet perfect for dedicated hobbyists.

With an impressive 9.25-foot peak height, over 12 feet of width, and massive sliding doors, the Summit delivers exceptional headroom and spacious growing area. Its bold barn-style design combines rugged strength with beautiful aesthetics that stand out in any backyard or garden. Grandio Summit 12x20 Hobby Greenhouse Kit for year round gardening.

Customize Your Setup
Add an optional back door transformation kit for a second entrance and improved accessibility.

Heavy-Duty Construction
Built with premium weather-resistant materials designed to withstand demanding outdoor conditions and provide lasting performance.

Large Growing Space
Its spacious 12x8 layout and tall interior create plenty of room for plants, shelving, and organized gardening setups.

Built for All-Season Performance
Efficient insulation, ventilation, and weather protection help create a reliable growing environment throughout the year.

Specifications

  • Height: 9' 3"
  • Width: 12'
  • Length: 20'
  • Frame Material: 1.2 mm heavy-duty aluminum with reinforced 1.5 mm areas
  • Reinforcement: Cross roof trusses and cross corner bracing
  • Frame Finish: Powder-coated green
  • Door Type: Bind-resistant double sliding door
  • Latch System: Magnetic latch with key lock
  • Door Dimensions: 3' 5" x 7' 1.5"
  • Polycarbonate Panel Thickness: 10 mm
  • Roof Vents: 10
  • Rain Gutters: Built-in
  • Steel Base Kit: Sold separately
  • Snow Load Kit: Included
  • Optional Back Door Kit: Available
  • Extendable: Yes, in 4' length extensions
  • Anchor Compatibility: Wood, concrete, dirt
  • Snow Rating: Maximum snow load of 25 lbs./ft²
  • Wind Rating: Withstands winds up to 76 mph when properly anchored

Basic Includes:
 10 Roof Windows, Rain Gutters, Drain Kit, Extreme Snow Load Kit

Grandio Summit 12x20 Accessories Upgrade
Includes: 10 Auto Window Openers, 2 Packs (10) Plant Hangers, 1 Trellis Kit, 1 Drip Kit, 2 Bottles of Cleaner (8oz.)

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