Cold frame fits your Compact VegTrug Patio Garden to provide plants with extra protection from harsh winds and cold temperatures, so you can plant earlier in spring and extend the growing season in fall. The result? An even bigger and better harvest! Also handy for hardening off plants before planting them in the garden. Polycarbonate panels provide diffused light. Adjustable braces hold the top panel open at various angles for precise ventilation. Cold frame can also be used directly on the ground.