Sigma DIY Greenhouse Kit 10 x 20 ft. with 6mm Double-Wall Polycarbonate Panels and Galvanized Steel Frame

The Planta Sigma 20 (Gen III) 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.

Built for durability, the Sigma 20 features a heavy-duty, rust-resistant galvanized pipe frame and 6mm double-wall polycarbonate panels, both engineered to withstand harsh weather conditions and keep your garden protected year-round.

With excellent end-to-end airflow and a distinctive 7-foot roof height, the Planta Sigma 20 provides a comfortable, well-ventilated environment for gardening. Its durable construction, weather-resistant materials, and spacious design make it ideal for growing vegetables, flowers, and more.

The greenhouse features an arched design that helps shed wind, snow, and rain for enhanced durability. Newly insulated doors at both ends help reduce heat loss and drafts, while upgraded door handles provide a sturdy grip and smooth operation. A new window/door latch connects the upper window and lower door sections, allowing them to open together as one unit for convenient access.

Designed to grow with your needs, the Sigma 20 can be extended beyond 100 feet, providing flexibility for future expansion.

Snow Load Weight of 55 psf (265 kg / m²)

Equal to 4.5 feet fresh snow layer and is maintenance free in the winter

Wind Resistant

Up to 65 mph (100 km/h)

Extendable & Customizable

This greenhouse can be extended with additional expansion kits (call to order)

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