Sinningia speciosa is the well-known “Florist’s Gloxinia”. These hybrids are loved for their large, brightly colored flowers. Almost every color combination is available. Some of these plants develop very large tubers and re-emerge from dormancy year after year. Old specimens may be passed down from generation to generation.
Scalloped, dark green, 8-12” long in rosettes, velvety hairy, often reddish below.
Clustered, upright or nodding, bell-shaped flowers 2-3” long: reds, purples, white; single or occasionally double in some cultivars: sometimes with spotting or marking; velvety; generally of two groups: Fyfiana are upright, Maxima are nodding.
Place in a bright, indirectly lit south, east, or west window.
55-60 degrees night time – 70-75 degrees daytime
Keep evenly moist. Water thoroughly and discard drainage. After flowering, gradually withhold water until the stems and leaves die back, then put the plant in a cool, dark place for 2-3 months. Water sparingly until new growth appears, then repot into fresh soil, move to light and water again.
Only when plant is growing or flowering
Humid, not direct on leaves
Crown rot in overly moist conditions. Will not bloom if light is too low. Flower buds blast (buds form, but fail to open) when air is too dry.
Popular flowering houseplant
After flowering and leaves die off, store tuber dry and cool, repot in spring and keep moist, well-watered once growth resumes; plant tuber with top at soil surface—too deep and it will rot; handle delicately as leaves are fragile and break at petioles easily
Gloxinias are not hardy and should be grown as greenhouse or houseplants. Plant in a 6” pot in a mixture of peat moss and sand with the round side down just beneath the surface (about 1/2 – 1”) deep. Water well once and keep the soil just moist until leaves start to develop. Keep in a humid, warm (70-75) spot in indirect, bright light. NEVER water foliage. Water lightly, do not saturate the soil. Gloxinias are slow starters; new sprouts may not show for 6-7 weeks. Rest potted Gloxinias in the house during late summer and water sparingly, or just enough so that they do not dry out completely.