Backyard Discovery Aggie Cold Frame Box

The lid uses a temperature-sensitive hydraulic cylinder. As the air inside the cold frame warms up, the fluid in the cylinder expands, pushing the piston to open the lid automatically; as it cools, the fluid contracts, allowing the lid to close.

Yes, it is designed for year-round use. The cedar wood and powder-coated steel construction are durable enough to withstand seasonal weather, and the double-wall polycarbonate panels provide the insulation needed to protect your plants from frost.

The unit requires assembly, but it is straightforward for anyone comfortable with basic tools. All necessary hardware is included, and the instructions are designed to be clear and manageable for a single person, though having a second pair of hands can make the process faster.

This is a raised-bed style cold frame with an integrated mesh liner and slats. It is designed to sit directly on the ground, allowing for direct soil contact and proper drainage while keeping your plants contained and protected.

The footprint is 48 inches wide by 28.75 inches deep. Because it is a compact, raised-bed design, it is ideal for small patios or tight backyard corners where a full-sized greenhouse wouldn't fit.

The double-wall polycarbonate is significantly more durable than standard greenhouse film. While it is designed to withstand typical garden conditions and provide excellent insulation, it is best to clear heavy, wet snow accumulation off the top to prevent unnecessary stress on the hinge mechanism.