cold frames

A cold frame is a transparent-roofed box or enclosure placed over plants or seedlings to protect them from harsh weather conditions, especially cold temperatures. It traps heat from sunlight, creating a microclimate that keeps plants warmer than outside. Cold frames extend the growing season by allowing you to start plants earlier in spring or finish crops later in fall, all while providing insulation and reducing frost damage. They are simple, cost-effective tools that help gardeners manage varying weather and promote healthier plant growth during cooler months.