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Winter
Spring
Summer |
Coldframe
In winter; Circa Week 46; Frames with glass or rigid plastic sides will not give as good protection against frost as solid-sided models, so it is wise to provide extra insulation for the winter. Cold frames should be covered at night, or lined with clear plastic to allow maximum light penetration. Thick sheets of polystyrene or similar foam materials are ideal and can usually be cut to shape with a fine toothed saw or bread knife. If pots are to be plunged to their rims in the base, sink in more insulation sheets to around 18” (45cm) deep to form an open topped box, then fill with sand or similar material.
In Spring; Circa Week 20; Open the tops/lids when the weather is suitable to allow maximum light and ventilation into the plants to harden them off, in preparation for planting out.
In Summer; Circa Week 24; Utilise the space taken up by the coldframe/s to grow semi-hardy plants that may require some protection in the UK.
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