Octagonal Cedar Greenhouse Kit 9 x 12 ft. with 3mm Safety Glass and Western Red Cedar Frame

The Octagonal cedar greenhouse combines striking geometry with enduring strength and timeless appeal. Crafted from Grade A knot-free Western Red Cedar, each piece is elevated on a protective aluminum frame and treated to resist aging, moisture, and rotting. Its high-pitched roof and expansive glass panels flood the interior with natural light, while integrated ventilation helps maintain a comfortable growing environment throughout the seasons.

Each Octagonal greenhouse is built with a heavy-duty cedar frame and thoughtful features designed for performance and longevity, including automatic opening roof vents, louvre windows, and 3mm safety glass secured with screw-in aluminum capping. High eaves provide increased headroom and improved airflow, while overlapping roof glass helps prevent leaks. An aluminum base keeps the wood off the ground to reduce the risk of moisture damage, and aluminum guttering with a downspout ensures efficient water management. The wide-angle, low-threshold door with a secure lock allows for easy, convenient access. The Octagonal includes upper and staging shelves.

More than a greenhouse, the Octagonal becomes a destination within the garden. Whether used for growing, entertaining, or quiet retreat, it surrounds you with the natural beauty of cedar and the warmth of sunlight, reflecting Alton’s century of craftsmanship in every detail.