Grandio | Summit 12x20 Greenhouse | SUMMIT-1220

Overview

The Summit 12x20 Greenhouse Kit provides a spacious, durable solution for gardeners who want to grow plants year-round. Built with a heavy-duty aluminum frame and thick, UV-protected polycarbonate panels, it's engineered to withstand changing weather conditions while creating an ideal growing environment for vegetables, herbs, flowers, and seedlings. Its classic barn-style design offers generous headroom for taller plants and shelving while adding an attractive focal point to any backyard or garden. Whether you're an experienced grower or just getting started, the Summit 12x20 delivers the perfect combination of strength, functionality, and style.

Benefits

Built to Handle Every Season

Constructed with a robust 1.6mm heavy-duty aluminum frame and 10mm twin-wall UV-protected polycarbonate panels, the Summit 12x20 is designed to maintain a stable growing environment throughout the year. The insulated panels help regulate temperatures while protecting plants from harsh weather, allowing you to extend your growing season and enjoy reliable gardening in virtually any climate.

Excellent Ventilation and Easy Access

Healthy airflow is essential for thriving plants, and the Summit 12x20 delivers with 10 adjustable roof vents that allow fresh air to circulate throughout the greenhouse. The bind-resistant sliding double doors are suspended from above to prevent sticking or jamming, making entry and exit effortless even when carrying gardening tools, trays, or large plants.

Built for Stability and Everyday Convenience

Designed with durability in mind, the Summit 12x20 includes reinforced roof trusses, cross-corner bracing, stainless steel hardware, integrated rain gutters, a drainage kit, a snow load kit, and an anchor kit for added stability in challenging weather conditions. Lockable handles provide additional security, while durable nylon door wheels ensure years of smooth operation.

Premium Model Includes Exclusive Accessories

Choose the Premium Model and receive a complete greenhouse growing package designed to maximize convenience and productivity. In addition to the greenhouse itself, the Premium Model includes:

• 10 Automatic Roof Vent Openers for hands-free temperature control

• 20 Plant Hangers for organizing baskets and hanging plants

• 2 Brillianize Anti-Static Panel Cleaners to keep greenhouse panels clean and crystal clear

• 1 Trellising Kit for supporting climbing plants and maximizing growing space

• 1 Drip Irrigation Kit to simplify watering and promote healthy plant growth

These premium accessories help automate maintenance, improve organization, and create the ideal growing environment right from day one.

Features

• Heavy-duty 1.6mm aluminum frame

• Durable powder-coated green finish

• 10mm twin-wall UV-protected polycarbonate panels

• Bind-resistant sliding double doors

• Magnetic door latch with keyed lock

• Cross-roof truss and cross-corner reinforcement

• Stainless steel nuts and bolts

• Integrated rain gutters

• 10 adjustable roof vents

• Wind resistance up to 76 MPH

• Snow load capacity up to 25 lbs./ft²

Specifications

• Overall Dimensions: 12' W x 19.78' L x 9.25' H

• Door Opening: 41.5" W x 85" H

• Frame Material: Heavy-duty aluminum

• Frame Finish: Powder-coated green

• Panel Material: 10mm twin-wall UV-protected polycarbonate

• Doors: Bind-resistant sliding double doors

• Door Lock: Magnetic latch with key lock

• Reinforcement: Cross-roof truss and cross-corner bracing

• Hardware: Stainless steel nuts and bolts

• Rain Gutters: Included

• Ventilation: 10 adjustable roof vents

• Wind Rating: Up to 76 MPH

• Snow Load Rating: Up to 25 lbs./ft²