Houseplant · Gesneriaceae
African Violet
Streptocarpus ionanthus
Offer it soft indirect light and a warm drink drawn from below, and the African violet returns blooms across nearly every season.
Bright indirect
60–80°F · 16–27°C
USDA 11–12
6–9 in · 15–23 cm
Overview
Of the houseplants that flower happily indoors, the African violet remains among the most generous, a habit carried down from the cool, mist-wrapped highlands of Tanzania. The name is a charming misdirection, since the plant claims no kinship with true violets. Its place is among the Gesneriads, the same refined company as the streptocarpus gracing so many sills. A later reclassification drew it into the genus Streptocarpus, which is why a label reading Saintpaulia and one reading Streptocarpus ionanthus describe a single plant.
It is the form that earns it a place in a room. A low, plush rosette of fuzzy, rounded leaves rests against the soil, and from its heart rise small flowers in purple, pink, white, or blue, a quiet bloom that suits a bedside table or a kitchen sill. The plant keeps an obliging scale, only 6 to 9 inches (15 to 23 cm) across, so a mature one settles neatly onto a single saucer. Set it in a thoughtful corner and it offers buds in close to every month of the year.
Its moderate standing rests on a pair of small temperaments rather than any genuine demand. The velvety leaves will mark wherever cold water touches them, and the crown will rot under soil left too wet. Learn to water from beneath with tepid water and to read the light, and the plant repays that modest attention with one flush of bloom after another.
Care
The short version: soft indirect light from an east or north window, a steady warmth between 60°F and 80°F (16°C to 27°C), and a porous soilless mix held evenly moist. Draw water from below with room-temperature water, feed lightly through the growing season, and let it sit a touch pot-bound to coax more bloom.
Light
Place it in soft indirect light at an east or north window, where the leaves catch a generous glow yet escape the glare of midday. It will make do with medium light and a measure of shade, though bloom thins once the spot grows too dim. Beneath a fluorescent or LED light for 14 to 16 hours a day, it keeps flowering through the dull stretch of winter.
Water
Hold the soil evenly moist, never sodden, letting the top inch dry before the next drink. Water from beneath: rest the pot in warm or room-temperature water for about 30 minutes, then let it drain. Because cold water and stray droplets bruise the velvety leaves into pale rings, keep the foliage dry, and remember that excess water is the foremost cause of crown and root rot.
Soil
Give it a loose, porous, free-draining soilless mix in place of dense garden soil. A packaged African violet blend will serve, or compose 3 parts sphagnum peat moss with 2 parts vermiculite and 1 part perlite and a little lime. A gently acidic pH of 6.2 to 6.5 sits best with the roots.
Temperature
Warm, even rooms keep it at ease, somewhere between 60°F and 80°F (16°C to 27°C). Cold drafts and chill nights dull its pace and can hold its flowers in check. Settle it clear of cold glass and the dry rush of a heating vent.
Humidity
Ordinary indoor air suits it well, with 40% to 60% humidity striking the ideal. Lift the moisture too high without good airflow and you make a home for powdery mildew and Botrytis. A little air between plants tends them better than any daily misting.
Feeding
Feed once a month through the growing and flowering months, from spring into fall, with a balanced or African violet fertilizer. Keep it light, at a quarter to half the label strength, since a heavy hand favors leaf over flower. Rinse the pot through with plain water from time to time to carry off the salts that gather.
Pruning
Lift away spent flowers and any tired or yellowed leaves to keep the rosette trim and temper the threat of Botrytis. Where a single, neat crown is wanted, pinch off the offset suckers as they rise. That light grooming is the whole of the task, for the plant asks for no hard cutting back.
Repotting
Refresh it once a year with new mix to renew the soil and clear the salts that build. Keep it a touch pot-bound, in a pot near half the width of its leaf spread, which leans it toward fuller bloom. When an older plant lifts a bare neck, set it lower in the fresh pot and bury the stem to its lowest leaves.
Size & spacing
This is a small, composed plant, holding near 6 to 9 inches (15 to 23 cm) in height and as much across. Allow each one a breath of space on the sill so air can drift between them. Such spacing keeps mildew and mites from traveling through a gathered collection.
Troubleshooting
African violet troubles tend to surface in the foliage, or in a plant that grows on contentedly yet declines to flower. Reading the earliest signs lets you act before a slight fault deepens into rot or a sullen, stalled plant. Find the picture that matches yours below, then make the small correction while it still earns its keep.
A soft, darkened crown with collapsing leaves
This is crown and root rot, and it nearly always follows from overwatering or soil pressed against the crown. Lift the plant and you meet decayed roots and a soft, discolored base. One this far gone seldom recovers, so part with it, then begin anew in a clean pot of porous mix with the crown held above the soil line.
Fix:
- Discard severely affected plants to prevent spread
- Use sterilized soilless mix and clean, sanitized containers (1:9 bleach soak)
- Plant with the crown above the soil surface and improve drainage
Twisted, hairy center growth with curled edges and lost buds
A cyclamen mite infestation lies behind it, and the mites are far too fine to catch by eye. They mass at the center and leave the new growth grayish, curled, and stunted as the buds abort. Set the plant apart at once, part with it if it is badly struck, and treat the rest with a labeled miticide at roughly 3-day intervals.
Fix:
- Isolate infested plants immediately
- Discard badly affected plants
- Treat with a labeled miticide (insecticidal soap, sulfur, or tau-fluvalinate) at about 3-day intervals
Lush foliage, yet not a single bloom
More often than not the answer is too little light, for the plant wants bright indirect light or a long lamp-lit day before it will set buds. A heavy feeding hand can tip it toward leaf over flower as well, so ease the fertilizer back. Move it to an east or north window, or grant 14 to 16 hours of light a day, and keep the room warm.
Fix:
- Move to bright indirect light or add fluorescent/LED light for ~14-16 hours/day
- Reduce fertilizer to a low/dilute rate and flush accumulated salts with plain water
- Maintain warm temperatures (about 60-80°F) and improve air/soil conditions
Cottony white clusters or a silvery sheen on the leaves
Cottony white tufts in the leaf axils mark mealybugs, while silvered, rasped patches mark thrips. Each one warps and stunts the growth it feeds upon. Lift the mealybugs with an alcohol-soaked swab, treat with insecticidal soap or a labeled systemic, and keep the plant apart while it mends.
Fix:
- Remove mealybugs with an alcohol-soaked cotton swab
- Treat with insecticidal soap, or a soil-applied systemic (e.g., imidacloprid granules) per label
- Isolate the plant while treating
A dusty white veil across leaves and blooms
This soft coating is powdery mildew, a fungus that settles where the air hangs still and humid. It drifts across foliage and flower alike where plants crowd one another. Open the air around the plant, lift away the worst leaves and blooms, and bring the humidity down.
Fix:
- Improve air circulation around the plant
- Remove affected flowers and leaves
- Reduce excess humidity
Gray-brown fuzzy mold on leaves or faded flowers
This is Botrytis blight, a fungus that takes to dead or fading tissue and travels through damp, still air. It tends to begin on a spent flower or the underside of a leaf before it spreads. Clear the dead material away, keep the foliage dry, and grant the plant kinder airflow.
Fix:
- Remove and discard dead plant material and affected leaves/flowers
- Improve air circulation
- Keep foliage dry
Pale spots or rings marking the velvety leaves
This traces to cold water meeting the foliage, often a single droplet that lingered and bleached the tissue below. The marks are merely cosmetic, though they never fade once set. Move to watering from below or to room-temperature water, keep the leaves dry, and lift away the most blemished among them.
Fix:
- Switch to bottom (sub-irrigation) watering or use room-temperature water
- Keep foliage dry when watering
- Damaged leaves will not recover; remove the worst-affected ones
A bare neck rising beneath the leaf rosette
This is simply the work of age, as the oldest lower leaves fall and leave the stem in view over time. The remedy is easy, and the plant accepts it with grace. Repot and set it low in the container, burying the bare neck to its lowest set of leaves.
Fix:
- Repot and set the plant low in the container, burying the stem up to the lowest set of leaves
Toxicity
A reassuring note for homes shared with pets and small children: the African violet is non-toxic in every part. The ASPCA lists it as safe for cats, dogs, and horses, and an inquisitive nibble brings nothing graver than a mild, fleeting upset stomach. The one real caution is the pesticide or systemic insecticide a grower might reach for, so keep such treatments off any plant within reach of pets or little hands.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats Safe
Cats may keep the shelf alongside this plant. Its velvety leaves hold no toxins, so an idle taste does them no harm.
Dogs Safe
Dogs rest just as easy here. A leaf mouthed by a curious one risks no more than a brief, mild turn of the stomach.
Horses Safe
Horses have nothing to fear from it, a plant the ASPCA records as non-toxic to them.
Rabbits Safe
Rabbits may sample a stray leaf without consequence, though any houseplant is best kept a rare indulgence rather than a meal.
Livestock Safe
Cattle, goats, and sheep meet no risk of poisoning, even as an indoor plant rarely finds its way to them.
Birds Safe
Pet birds and backyard hens keep good company beside it, with no toxic part to give pause.
People Safe
People come to no harm either, which makes it a graceful choice for a home with small children and curious toddlers.
Although the plant itself is non-toxic, pesticides or systemic insecticides applied to the soil or foliage could be harmful, and chewing fibrous leaves may cause mild, non-toxic stomach upset
How to propagate
Few houseplants give themselves so freely as the African violet, and a lone leaf is the whole of what you need. An older clump, split at repotting, offers a graceful second way to turn one plant into two.
Leaf cuttingsEasy
Any time during active growth · Plantlets form in 1-3 months
Leaf cuttings are the timeless way to reproduce an African violet, and the moment is right any time the plant is in growth. Lift a healthy leaf with its stalk, settle the stalk into moist mix, and keep it warm. Slender plantlets rise at the base in 1 to 3 months, each maturing into a fresh plant ready for a pot of its own.
DivisionEasy
At repotting · Several weeks
An older plant grown into several crowns can be parted into separate plants at repotting. Ease the clump open and free any rooted offset suckers, then give each piece its own container. The divisions find their footing within a few weeks and continue on without a pause.
Myths
The African violet is a true violet, a relative of the wild Viola.
The name has misled many, yet the two plants share no relation at all. African violets belong with the Gesneriads, the company of streptocarpus, while the true violets fall to Viola. All they truly hold in common is the cast of the flower.
Never let a drop of water rest on the leaves.
The genuine trouble is cold water on the velvety foliage, which is what bleaches those pale spots and rings. Tepid, room-temperature water works no such harm, and a drink drawn from below avoids the matter entirely. Pour warm water and the leaves stay flawless while the soil keeps its moisture.
Its botanical name is still Saintpaulia ionantha.
Taxonomy has carried it forward. Kew's Plants of the World Online now holds Streptocarpus ionanthus as the accepted name, after the old genus Saintpaulia was drawn into Streptocarpus. The 1893 name Saintpaulia ionantha endures as a synonym, so both labels rest on one plant.
Sources
- NC State Extension Plant Toolbox
- Clemson Cooperative Extension HGIC
- Missouri Botanical Garden Plant Finder
- University of Wisconsin-Madison Division of Extension
- Iowa State University Extension and Outreach
- University of Minnesota Extension
- ASPCA Animal Poison Control
- Plants of the World Online, Royal Botanic Gardens Kew