As overnight temperatures begin to dip below 3C, gardeners are being urged to take action to protect vulnerable plants from frost damage. Tender, young or container-grown plants are most at risk, according to Morris Hankinson, managing director of Hopes Grove Nurseries.
Move potted plants to shelter
For potted plants, the advice is to move them into sheltered spots such as a greenhouse or porch. If relocating them is not an option, covering plants with horticultural fleece can keep frost at bay. The fleece should reach right down to the ground and be firmly secured so cold air cannot creep underneath.
Should a particularly severe frost be on the way, a double layer of fleece may be needed, but it should not be left on any longer than necessary. Fleece restricts both light and ventilation, which can ultimately prove fatal for plants.
Adjust watering routines
If a frost is forecast, watering routines should be adjusted accordingly. If the soil is particularly parched, watering carefully can help plants before harsh frost conditions set in. However, overwatering should be avoided, especially in cold, heavy soils.
During winter, watering at night should stop, as this can leave moisture on leaves and stems, increasing the risk of freezing. Switching to morning watering instead gives the water far longer to soak into the soil.
Leave dead stems in place
Although it may be tempting to cut everything back before winter, leaving some dead stems and foliage in place provides protection for plants and shelter for wildlife.
Not every plant requires protection; hardier varieties will cope perfectly well with frost. Lavender, sage, rosemary, thyme, foxgloves, hellebores, hardy geraniums and lupins will fare just fine in a typical UK frost. Well-established native shrubs and trees should also largely be fine.
