What is a gloxinia?
Gloxinia (Sinningia speciosa) is a tuberous flowering houseplant from the rainforests of Brazil, grown for its large, velvety, trumpet-shaped blooms in rich shades of red, purple, pink, and white — often with contrasting throats or ruffled edges. It belongs to the Gesneriaceae family and is a close relative of the African violet and cape primrose. Plants are typically sold in full bloom at garden centers and are prized as gifts and windowsill statement pieces.
How much light does a gloxinia need?
Gloxinia does best in bright, indirect light — think a few feet from an east- or north-facing window, or a bright south window filtered by a sheer curtain. Direct midday sun scorches the soft, velvety leaves and bleaches the blooms, while too little light produces leggy growth with few or no flowers. A light meter reading of 1,000–2,000 foot-candles is ideal during the growing season.
How often should you water a gloxinia?
Water every 5–7 days during active growth, always at soil level — never splash the crown or leaves, as trapped moisture rots the tuber quickly and causes leaf spotting. Let the top half-inch of soil dry slightly between waterings. Use room-temperature water; cold water on the velvet leaves leaves permanent white spots. Bottom-watering (placing the pot in a tray of water for 20 minutes) is the safest method.
How do you care for a gloxinia after it finishes blooming?
This is where most growers lose the plant. After the last flowers fade, don’t discard it — the tuber stores energy for a second bloom. Gradually reduce watering over several weeks, let the foliage yellow and die back naturally, then store the dry tuber in its pot in a cool (50–60°F), dim spot for 8–12 weeks. When you repot into fresh well-draining mix and move it back to a bright, warm spot with regular watering, new growth will emerge within a few weeks and blooms follow within 8–10 weeks.
Why is my gloxinia dropping buds before they open?
Bud drop almost always traces to one of three causes: low humidity, cold drafts, or a sudden temperature swing. Gloxinia wants steady warmth (65–75°F) and humidity above 50%. Keep it away from air-conditioning vents, open windows, and cold windowpanes. A pebble tray filled with water under the pot raises local humidity without wetting the foliage.
Is gloxinia safe for pets?
Yes — the ASPCA lists gloxinia (Sinningia speciosa) as non-toxic to cats and dogs, which makes it one of the better choices among showy flowering houseplants for pet owners. That said, keep it out of reach to avoid soil ingestion or knocked-over pots.