How Do You Induce Long Day Flowering Plants?
Botanists classify long-day flowering plants as plants that require a dark night shorter than a critical length to produce their flowers. Although they are traditionally referred to as long-day plants, it is the short night that matters. The threshold for flowering varies from plant to plant, with some flowering when nights are shorter than 12 hours and others requiring nights shorter than 8 hours. When you are growing plants indoors, you can induce flowering in long-day plants even during the winter–when the days are too short–by using artificial lighting. Place your plants near a window that receives direct sunlight during the day. Watch the plants in the morning and evening and note the times when the plants start receiving direct sunlight in the morning and stop receiving direct sunlight in the evening. Add up how many hours of light the plant gets during a typical day. Subtract this from the plant’s required day length, if you know it, to find how many hours of supplementary lig
