Slow- release fertilizers are a practical way to supply safe levels of nutrients at each watering. Violets need strong, bright light but not direct sun. Lack of light curtails blooming and causes leaves to grow upright. Too much light results in leaves that are brittle, scorched, and yellow. Under natural light, an east window is often the best in winter.
Northern exposures are better during hot, summer months.
African violets thrive under fluorescent lights turned on for 12 to 16 hours a day. The optimum temperature for this houseplant is between 65 and 75 degrees F. Temperatures below 60 degrees F or above 80 degrees F will result in reduced bloom. Keep violets away from frosty windowpanes during cold winter months. Or insulate with a thick layer of newspaper between plants and glass. If your house is dry, place the plants on trays filled with wet pebbles to increase the humidity.