Move dormant fuchsias, heliotropes, hydrangeas and other pot plants on to the greenhouse staging. The ideal is a warm spot where a temperature of 10°C (50°F) can be maintained. Spray the plants with water on sunny days, and give them increasing amounts of water as growth becomes active. Remove dead and discoloured foliage. Start dahlia tubers into growth and pot up lilies. Potting on Check young plants and rooted cuttings regularly and pot them on into larger pots as soon as their roots fill the pot they are in. Sowing Seeds Sow seeds of greenhouse plants such as coleus, gloxinias, tuberous and fibrous begonias, abutilon and streptocarpus in seed trays in a heated propagator. When the seedlings are large enough to handle, prick them out into pots or trays filled with soilless potting compost and grow them on in warmth. Also sow early vegetables, shrubs, perpetual carnations, annual climbers, parsley and further half-hardy annuals. Tomatoes To raise tomatoes in a cool greenhouse, sow the seeds this month at a temperature of 1 5-20°C (60-70°F). Vines It is essential that vines are properly chilled in winter, so keep the greenhouse well ventilated until growth starts. Once growing, a vine needs as much light and heat as possible, so reduce the ventilation and apply a coat of white paint on the wall of a lean to greenhouse to increase the intensity of the light.