Gloxinia flowers (Sinningia speciosa), popular gift plants most widely available during the winter holidays through early spring, produce large, trumpet-shaped flowers that rise above the velvety foliage. Blossoms appear in shades of red, pink, purple, blue and white, though some are bi-colored or feature petals bordered in white. When brought home and given proper care, gloxinia flowers should continue to bloom for at least two months before entering dormancy. Though some gardeners simply discard the plant after blooming ends, it can be coaxed into blooming again the next season with special care.
Keep gloxinia flowers in a location that receives bright, indirect light throughout the day, such as a north- or east-facing window. Maintain a temperature of 75 to 80 degrees Fahrenheit during the day and 65 to 70 degrees at night. Normal household temperatures are usually sufficient for gloxinia.
Spray gloxinia flowers with water twice a day, once during the early morning and again at mid-day, to increase the relative humidity of the air. Fill a spray bottle with room temperature water to avoid shocking the plant and gently mist the air around the leaves.
Water once every five days to keep the soil consistently moist. Soak the soil until water begins to seep from the drainage holes on the bottom of the container, and then drain away any excess moisture. Never allow the plant to sit in water, or damage may occur.
Reduce watering frequency gradually when the foliage begins to die back by increasing the number of days between watering by one day each week. Continue until all the leaves are yellow and dead. Transfer the container to a cool, dark location and cease watering altogether.
Keep the gloxinia flowers in this location for eight to 10 weeks, or until new growth begins again. Resume normal watering when this occurs. Transfer the plant back into its original growing location and flower buds will form shortly after.
Feed gloxinia when new buds appear using an all-purpose houseplant fertilizer to boost flower growth and formation. Apply at half the strength recommended by the manufacturer to avoid over-fertilizing.