Start by positioning the plant in bright light, close to a window but not in direct sunlight. Keep the compost just moist during winter and moist in summer and water regularly with a balanced liquid fertiliser during the growing season. If the plant continues to die back from the base more drastic action may be required. Wait until early spring and new growth flushes, then prune back the defoliated shoots to within 30cm of the ground - new growth should appear within one month, this will be clothed with leaves from the base. As the leaves emerge first they often protect the more delicate flowers from the worst of the weather.
Bulbs actually thrive better in cool dry periods than they do in cool wet ones.
If you are worried about frost damage you could cover the young shoots with a layer of horticultural fleece overnight during the worst weather, but this would have to be removed during daylight as it can force the plants to shoot more if left on. Plants like snowdrops are remarkably resilient and respond to environmental conditions, so a cold spell will naturally slow their growth. Guzmania berteroana , the spratan star or flaming torch, originates from the tropical rain forests of Puerto Rico. It is a rosette forming perennial and in the wild the over-lapping leaves form water holding reservoirs. In the UK this plant is happiest growing in partial shade in a conservatory.