Wooden Cold Frames
Most keen gardeners prefer to start off their seedlings or overwinter their dormant plants in a wooden cold frame, due to the thermal insulation provided.
This protection and increased warmth allow for an extended growing season in veg gardens and at the allotment. A box-style frame acts like an unheated greenhouse, offering a microclimate trapping the solar energy to warm the plants. These mini wooden grow houses generally come as a single or double frame, sunken into the ground with opening lids for ventilation and access. Forest Garden, Zest 4 Leisure, and Rowlinson are UK companies manufacturing wooden cold frames that arrive in a kit form and are easy to assemble.
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