Riga XL Greenhouses

The largest Riga greenhouse at 14' wide, built for serious year-round growing. Features highly insulating 16mm triple-wall polycarbonate, heavy-duty construction, and generous ventilation in a commercial-quality hobby kit.

Riga XL Greenhouses

The largest Riga greenhouse at 14' wide, built for serious year-round growing. Features highly insulating 16mm triple-wall polycarbonate, heavy-duty construction, and generous ventilation in a commercial-quality hobby kit.

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Why Choose the Riga XL Greenhouse

The Riga XL is the largest and most heavily insulated greenhouse in the Riga lineup, designed for serious gardeners who want commercial-quality performance in a hobby kit. It features 16mm UV-coated triple-wall polycarbonate for exceptional thermal insulation, with 10mm twin-wall polycarbonate on the front and rear walls for added strength.

Each model includes four large roof windows (37.5" x 39.5") with automatic openers and oversized Dutch-style doors (37.5" x 74") for excellent access and airflow. The result is a spacious, highly insulated greenhouse that delivers outstanding year-round growing performance and fits beautifully in upscale garden settings.

Riga XL Greenhouses

Frequently Asked Questions

Riga XL Greenhouses

How long does it take to assemble a Riga XL greenhouse?

Due to its larger size, assembly typically takes longer than smaller Riga models—plan on a full weekend with 3–4 people. Clear instructions are included, but the extra size and weight make additional help recommended.

Do I need a foundation for the Riga XL?

Yes. For dirt installations, the foundation frame is required. The Riga XL can also be installed on a concrete pad, wood foundation, or stem wall. Proper anchoring is especially important given the greenhouse’s size and wind exposure.

How well does the Riga XL handle snow and high winds?

Excellent. The curved design sheds snow effectively, and the heavy-duty aluminum frame combined with thick triple-wall polycarbonate provides strong structural performance. When properly anchored, it is engineered for demanding weather conditions.

Is the Riga XL suitable for year-round growing?

Yes. The 16mm triple-wall polycarbonate offers some of the best insulation available in a hobby greenhouse, making it one of the strongest choices for true four-season growing, even in cold climates. Supplemental heat may still be needed depending on your crops and location.

What makes the Riga XL different from other Riga models?

The Riga XL is significantly larger and uses 16mm triple-wall polycarbonate (instead of 8mm/10mm twin-wall) for superior insulation. It also features bigger roof windows, larger Dutch doors, and more overall growing space—ideal for serious gardeners who want maximum capacity and performance.

What polycarbonate is used on the Riga XL?

The main glazing is 16mm UV-coated triple-wall polycarbonate for maximum insulation. The front and rear walls use 10mm twin-wall polycarbonate for added strength.