Houseplant · Gesneriaceae
African Violet
Streptocarpus ionanthus
Give it bright indirect light and a warm, steady drink from below, and the African violet blooms almost all year.
Bright indirect
60–80°F · 16–27°C
USDA 11–12
6–9 in · 15–23 cm
Overview
Few houseplants flower as freely indoors as the African violet. It comes from the cloud forests of Tanzania, and despite the name it is no relation to true violets. It belongs to the Gesneriad family instead, which it shares with the streptocarpus on many windowsills. Botanists have since folded it into the genus Streptocarpus, so a tag reading Saintpaulia and one reading Streptocarpus ionanthus point to the same plant.
The look is what wins people over. A low rosette of fuzzy, rounded leaves sits close to the soil, and from the center rise clusters of small blooms in purple, pink, white, or blue. The whole plant stays small, just 6 to 9 inches (15 to 23 cm) across, so a mature one fits on a saucer. Give it the right corner and it sets buds in nearly every month of the year.
It earns its moderate rating through a few quirks rather than any real fuss. The fuzzy leaves spot if cold water touches them, and the crown rots if the soil stays soggy. Learn to water from below with tepid water and read the light, and the plant rewards that small effort with bloom after bloom.
Care
The short version: bright indirect light from an east or north window, warmth between 60°F and 80°F (16°C to 27°C), and a porous soilless mix kept evenly moist. Water from the bottom with room-temperature water, feed at a low rate while it grows, and keep it a little pot-bound to push more flowers.
Light
Aim for bright indirect light from an east or north window, where the leaves get plenty of brightness but no harsh midday sun. The plant tolerates medium light and light shade, though bloom slows when it sits too dark. A spot under a fluorescent or LED light for 14 to 16 hours a day keeps it flowering through winter.
Water
Keep the soil evenly moist but never soggy, and let the top inch dry before the next drink. Water from the bottom: set the pot in warm or room-temperature water for about 30 minutes, then drain it well. Cold water or droplets on the fuzzy leaves leave pale spots and rings, so keep the foliage dry, and remember that overwatering is the top cause of crown and root rot.
Soil
Plant in a loose, porous, well-drained soilless mix rather than heavy garden soil. A packaged African violet blend works, or mix 3 parts sphagnum peat moss with 2 parts vermiculite and 1 part perlite plus a little lime. A slightly acidic pH of 6.2 to 6.5 suits the roots best.
Temperature
Warm, steady rooms keep it happy, somewhere between 60°F and 80°F (16°C to 27°C). Cold drafts and chilly nights slow the plant and can stall its flowers. Settle it away from cold windowpanes and heating vents alike.
Humidity
Average indoor air is fine, with 40% to 60% humidity hitting the sweet spot. Push the humidity too high without good airflow and you invite powdery mildew and Botrytis. A little space between plants does more good than a daily misting.
Feeding
Feed once a month while it grows and blooms, through spring into fall, with a balanced or African violet fertilizer. Mix it weak, at a quarter to half the label strength, since too much pushes leaves at the expense of flowers. Flush the pot with plain water now and then to wash out the salts that build up.
Pruning
Pinch off spent flowers and any dead or yellowed leaves to keep the rosette tidy and cut the risk of Botrytis. If you want a single neat crown, snap off the offset suckers as they form. That tidying is the whole job, since the plant never needs hard cutting back.
Repotting
Repot once a year with fresh mix to refresh the soil and clear out salt buildup. Keep the plant a little pot-bound, in a pot about half the width of its leaf spread, which nudges it toward more flowers. When an old plant grows a bare neck, set it lower in the new pot and bury the stem up to the lowest leaves.
Size & spacing
This is a small, tidy plant that stays around 6 to 9 inches (15 to 23 cm) tall and just as wide. Give each one a little elbow room on the windowsill so air can move between them. Good spacing keeps mildew and mites from spreading across a collection.
Troubleshooting
Most African violet trouble shows up on the leaves or in a plant that grows but refuses to bloom. Read the early signs and you can step in before a small issue turns into rot or a stalled plant. Match what you see below, then act while it still helps.
Mushy dark crown with leaves that droop and collapse
This is crown and root rot, and it almost always traces back to overwatering or soil held against the crown. Lift the plant and you find rotted roots and a soft, discolored base. A plant this far gone rarely recovers, so discard it, then start fresh in a clean pot of porous mix with the crown sitting 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 dead buds
A cyclamen mite infestation is the culprit, and the mites are far too small to spot with the eye. They cluster in the center and leave the new growth grayish, curled, and stunted while the buds abort. Isolate the plant at once, toss it if it is badly hit, and treat the rest with a labeled miticide every 3 days or so.
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
Lots of healthy leaves, but no flowers
Nine times out of ten this is too little light, since the plant needs bright indirect light or a long day under a lamp to set buds. Heavy feeding can push leaves over flowers too, so dial the fertilizer back. Move it to an east or north window, or add 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 silvery flecking on the leaves
Cottony white masses in the leaf axils point to mealybugs, while silvery rasped patches point to thrips. Both stunt and distort the growth they feed on. Dab mealybugs off with an alcohol-soaked swab, treat with insecticidal soap or a labeled systemic, and keep the plant apart from the rest while it recovers.
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 film on the leaves and blooms
This dusty coating is powdery mildew, a fungus that takes hold in still, humid air. It spreads across foliage and flowers alike when plants sit crowded together. Open up the airflow around the plant, snip off 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
Fuzzy gray-brown mold on leaves or spent flowers
This is Botrytis blight, a fungus that settles on dead or fading tissue and spreads in damp, still air. It often starts on a spent flower or the underside of a leaf before moving on. Clear away dead material, keep the foliage dry, and give the plant better airflow.
Fix:
- Remove and discard dead plant material and affected leaves/flowers
- Improve air circulation
- Keep foliage dry
Pale spots or rings marking the fuzzy leaves
This comes from cold water touching the foliage, often a drop that sat on a leaf and bleached the spot beneath it. The marks are only cosmetic, but they never fade once they form. Switch to bottom watering or use room-temperature water, keep the leaves dry, and pull off the worst-marked ones.
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 stem or palm-tree neck below the leaves
This is just natural aging, as the oldest lower leaves die off and leave the stem exposed over time. The fix is simple and the plant takes it in stride. Repot and set it low in the pot, burying the bare neck up to the 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
Good news for homes with pets and small children: the African violet is non-toxic all the way through. The ASPCA lists it as safe for cats, dogs, and horses, and a curious nibble brings nothing worse than mild, passing stomach upset. The only real caution is the pesticide or systemic insecticide some growers apply, so skip those treatments on a plant that pets or kids can reach.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats Safe
Cats can share a shelf with this one. The fuzzy leaves are non-toxic, so a curious chew brings no harm.
Dogs Safe
Dogs are in the clear too. A nosy pup that mouths a leaf faces nothing worse than maybe a little passing tummy upset.
Horses Safe
Horses have nothing to fear from this plant, which the ASPCA lists as non-toxic to them.
Rabbits Safe
Rabbits can graze a stray leaf without worry, though any houseplant should stay a rare treat rather than a meal.
Livestock Safe
Cattle, goats, and sheep face no poisoning risk from it, though as an indoor plant it rarely crosses their path.
Birds Safe
Pet birds and backyard hens are safe near it, with no toxic parts to worry about.
People Safe
People have nothing to worry about either, so it makes an easy pick 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
The African violet is one of the simplest plants to copy, and a single leaf is all it takes. You can also split an older clump at repotting time to make two plants from one.
Leaf cuttingsEasy
Any time during active growth · Plantlets form in 1-3 months
This is the classic way to copy an African violet, and it works any time the plant is growing. Snap off a healthy leaf with its stalk attached, sink the stalk into moist mix, and keep it warm. Small plantlets push up at the base in 1 to 3 months, and each one grows on into a new plant you can pot up on its own.
DivisionEasy
At repotting · Several weeks
An older plant that has formed several crowns can be split into separate plants at repotting time. Tease the clump apart and pull off any rooted offset suckers, then pot each piece in its own container. The divisions settle in within a few weeks and carry on without missing a beat.
Myths
The African violet is a true violet, a relative of the wild Viola.
The name fools a lot of people, but the two plants are not related at all. African violets sit in the Gesneriad family, the same group as streptocarpus, while true violets belong to Viola. The only thing they share is the look of the flower.
You must never let a drop of water touch the leaves.
The real trouble is cold water on the fuzzy foliage, which bleaches those pale spots and rings. Tepid, room-temperature water does no such harm, and watering from the bottom sidesteps the problem for good. Use warm water and the leaves stay clean while the soil stays moist.
Its botanical name is still Saintpaulia ionantha.
Botanists have moved it on. Kew's Plants of the World Online now treats Streptocarpus ionanthus as the accepted name, after the old genus Saintpaulia was folded into Streptocarpus. The 1893 name Saintpaulia ionantha lives on as the synonym, so both tags point to the same 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