Common Problems with African Violet Flowers and How to Solve Them

Nov 06, 2025 0

African violets (Saintpaulia) are popular houseplants, known for their vibrant blooms and fuzzy leaves. Native to East Africa, these plants were brought to Europe in the late 18th century by Baron Walter von St. Paul. By the early 1900s, they were blooming across Europe and around the world.

The development of hybrid varieties with various flower colors increased their popularity. Since the 1920s, hundreds of cultivars have been developed with an immense variety of flower and leaf colors, shapes, and sizes.

While African violets have a reputation for being easy to care for, they can sometimes present challenges. Here's a guide to common problems and their solutions.

Light

Proper light is essential for good bloom. African violets require more light than most gardeners first realize.

Insufficient Light: Thin, dark, blue-green leaves with long petioles indicate insufficient light. Too little sunlight causes them to stretch for the light and produce few or no flowers.
Excessive Light: Too much sun can burn the leaves. Too much light produces stunted plants with leaves that are small, crinkled, leathery, and yellow. Direct light for long periods can be damaging.

Generally, windows with north and eastern exposures are best for African violets. They also need eight hours of darkness every night. Although they need sufficient light in order to produce a flowering hormone known as florigen, florigen does not trigger blooming until it gets dark.

Plants also grow well under fluorescent or LED lights. Place lights 4-8 inches above the plants for 12-16 hours per day to provide sufficient light to initiate blooms.

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Temperature

African violets require air temperatures between 65 and 80°F. Temperatures below 50°F will cause leaves to darken, wither, and become watersoaked. Temperatures above 85°F will slow growth and flowering.

Watering

Watering African violets is often the most difficult part of their care. The plants require a moist, well-drained soil.

Too Wet: If the soils are too wet, the plants may rot. Too much water can lead to root rot. Crown rot is a common fungal problem of African violets that are overwatered or recently repotted.
Too Dry: If plants are too dry, growth will be stunted and flowering will be limited. Roots start to die in soil that is too dry much of the time.

African violets prefer to stay evenly moist - ideally, the soil feels like a well-wrung-out sponge. They do not like to dry out completely in between waterings, but they do not like to be sopping wet all the time.

Water temperature becomes especially important during the winter months, as cold water directly on the leaves will damage them quickly. African violets are often sub-irrigated by placing the plant in a saucer of water and allowing the plant to soak up water from the bottom of the pot.

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This prevents injury from cold water on the leaves and insures moisture throughout the soil. However, plants should not remain submerged in saucers of water for long periods as they may rot. Allow the top inch of the soil to dry before sub irrigating again.

African violets also can be watered from the top of the soil if room-temperature water is used and the foliage remains dry. In fact, occasional top watering is recommended to prevent salt accumulation.

Specially designed African violet pots allow continuous watering. A water reservoir at the base of the plant and an absorbent wick, or porous surface connects the soil and the water reservoir. This method is effective in maintaining an even moisture level of the soil. However, periodic leaching of the soil profile with water from the top might be necessary to prevent the accumulation of salts.

Fertilization

Regular fertilization encourages plants to bloom throughout the year. Unlike plants that grow outdoors, houseplants are totally dependent on the grower to apply sufficient nutrients without overdoing it. The small pots these plants are typically grown in do not maintain a large reserve of nutrients. If you do not fertilize them on a regular basis, they may not have the necessary nutrients to spend on flowers.

A complete fertilizer applied at a low rate is best. You can purchase fertilizers formulated specifically for African violets. You should always use a balanced fertilizer that contains all of the major plant nutrients: nitrogen (N), phosphorus (P), and potassium (K). Nitrogen is important for the growth and development of leaves and stems. Phosphorus is important for healthy roots and flowering.

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These major nutrients are represented on the fertilizer label by numbers known as the analysis. Typically, fertilizers for flowering plants contain more phosphorus than nitrogen, perhaps an analysis of 8-14-9. The African Violet Society of America recommends choosing a fertilizer that does not use urea as the nitrogen source because African violets are sensitive to it and it can burn their roots. You can determine if a fertilizer contains urea by looking at the Guaranteed Analysis on the label. It lists the source of the nutrients it contains.

Excessive fertilization leads to vigorous vegetative growth, poor flowering, and the accumulation of salts in the soil. Plants can be fertilized with special fertilizers formulated specifically for African violets or with a general, balanced fertilizer at 1/2 or 1/4 strength.

Soils

A loose, porous, fertile soilless mix is recommended for growing African violets. It is good practice to periodically repot houseplants because the soil should be refreshed periodically. You can often repot the plant into the same pot after cleaning it well, using fresh potting mix.

Finally, if you have recently repotted your African violet into a larger pot, the pot may be too big. African violets prefer to be root-bound to bloom well.

Common Leaf Problems

Usually the first visible sign of disease in African violets appears on the leaves. Leaf changes are one of the first ways your plant will signal something isn’t right in its environment. Here are some common leaf issues:

Pale or Bleached Leaves: Leaves that become pale or bleached in appearance typically occur when plants receive too much light. Move to a lower light situation or increase the distance between a supplemental light source and the plant's leaves to reduce light intensity.
Leaf Spots: If water is allowed to sit on leaves, it will often cause discolored spots to form, especially with cold water. Water plants from underneath by setting the plant in a tray of water and allowing the water to be drawn up from the bottom. Remove the excess water in the tray once the entire root ball is saturated.
Brown, Crispy Leaves: African violet leaves are extremely sensitive to water. If you accidentally get your plant’s leaves wet while watering, and they’re exposed to direct sunlight, it can lead to brown spots and sunburn. Unfortunately, if this is the case, the affected leaves won’t recover and will need to be removed. If your plant’s leaves are brown and crispy around the edges-rather than brown spots throughout the leaf-you may have some issues below ground. African violets have delicate root systems that can easily struggle when exposed to overfertilization.
Yellow Leaves: When a leaf yellows, it’s a likely sign it’s starting its journey to the great greenhouse in the sky. As it nears the end of its life cycle, your plant will stop sending nutrients in its direction; instead, it saves that energy for higher-functioning foliage. African violets grow from the crown outward, so if you notice the leaves closest to the surface turning yellow, they’re probably on their way out.
Limp and Droopy Leaves: This is a sign your plant can’t properly deliver nutrients to its cells. If your plant isn’t getting enough water, it won’t be able to keep its leaves healthy and firm. Diagnose this issue by checking the soil: is it bone-dry? If so, your plant baby is dehydrated! Set it in a tray of room-temperature water and allow it to take up as much water as it needs through the holes in the bottom of its pot. When an African violet stays in oversaturated soil for too long, air can’t reach the roots. This creates prime conditions for root rot and fungus. If the soil feels damp or mushy, remove your plant from its soil and check for root rot.
Water Spots: Water spots are caused by a difference between leaf temperature and water temperature when water is dropped on an African violet leaf. Prevent water spots by bottom watering rather than top watering African violets. There’s no way to undo water spots that appear; however, the spots don’t spread and won’t harm your African violet’s growth.
Curling Leaves: If your African violet’s leaves are curling under and turning brittle, they’re not warm enough! You may also notice your plant has grown extra “fur” on its leaves to protect itself. If you think cold air is the culprit, rescue your African violet from that drafty hallway or chilly great room and transport it somewhere more pleasant. Your plant will be happiest in a space with a steady temperature of 68-70ºF. If you’re certain your plant hasn’t caught a chill, too much sunlight might be to blame. African violets like bright, indirect sunlight. But when they’re placed in hot, direct sunlight, their leaves can start to suffer. If your plant is placed in a windowsill-or a particularly sunny room-too much sunlight might be causing its leaves to curl under.

Diseases

Sometimes, even with the best care, your African violet may show signs of disease. Here are some common diseases and how to address them:

Bacterial Blight: Bacterial blight looks like black rot attacking an African violet’s crown and roots. The spots that show up sometimes appear brown or dark red rather than black. To treat this disease, use sterilized scissors to cut away any leaves or roots that have spots or show signs of infection.
Botrytis Blight: The first warning signs of botrytis blight are gray blooms and a lack of growth at the crown. Then the leaves will start to develop fuzzy gray and brown spots. Finally, the African violet will wilt. To treat this disease, isolate plants that show signs of infection and use sterile tools to remove any portions of the plant that have spots. Use a fungicide to keep the infection from returning. Botrytis blight spreads quickly, so there’s no guarantee you’ll be able to save an infected African violet.
Powdery Mildew: The first sign of powdery mildew on African violets is the appearance of a light powder that seems to cover the leaves and flowers. There may also be discoloration in the blooms. You can prevent powdery mildew by making sure there’s enough space between your plants to allow for enough airflow. To treat plants with powdery mildew, first isolate the affected plants to prevent the mildew from spreading. Try treating the plants with a homemade mix to begin with. Mix one tablespoon of baking soda with one gallon of water, and coat the infected plant with the mixture. If that doesn’t work, then you may have to use a fungicide made to treat powdery mildew.
Crown Rot: To prevent Phytophthora crown rot, avoid overwatering African violets and use a well-draining potting soil in a container that allows excess water to escape. Treating Phytophthora crown rot is extremely difficult. In most cases, the best plan of action is to get rid of the plant, the soil, and the container to prevent the fungus from spreading to other African violets. If you decide to try to treat crown rots, you’ll need to remove the infected parts of the plants and replant the African violet in a new container.
Root Rot: The main visible symptoms are leaves that turn yellow, wither, and fall off. Prevent Pythium root rot by allowing the soil to almost dry out between waterings. There isn’t a good treatment for root rot, so the best thing to do with an infected African violet is get rid of the plant and the potting soil.
Rhizoctonia Crown Rot: The signs of Rhizoctonia crown rot are wilting, collapsing, turning black, and dying. Prevent Rhizoctonia crown rot from developing by making sure your African violet’s soil is quick-draining and doesn’t hold on to excess water. There is no good way to treat this disease. Immediately remove the infected plant. Get rid of the plant and the soil without allowing it to come into contact with other plants.

Pests

Since African violets are kept indoors, they don’t usually have too many issues with pests. Here are some common pests and how to manage them:

Foliar Nematodes: The most common visible symptom of foliar nematodes is wilting leaves. Prevent nematode infections by isolating new plants before bringing them into the same area as other plants. There’s no good treatment for foliar nematodes. While there are a few pesticides available that target foliar nematodes, you need a pesticide license to buy those.
Cyclamen Mites: Cyclamen mites are the most damaging mites that bother African violets. These mites are very tiny but can be seen with a magnifying glass. Cyclamen mites have eight legs and can be either white, yellow, or brown. The best way to prevent a mite infestation is to isolate new plants until you’re certain they’re not infected. To treat a mite infestation without using a chemical treatment, you can spray neem oil or Leaf Armor on infected plants. Make sure to keep infected African violets isolated until the infestation is under control.
Mealybugs: Signs of a mealybug infestation are fairly similar to other problems, including white specks on the leaves or stems, sticky honeydew on the leaves, or black fungus on the leaves. Mealybugs are tiny insects about 1/16 to ¼ inch in size and are covered in a sticky, white, powdery substance. The best way to prevent a mealybug infestation is to inspect new plants before bringing them home. Check both the plant itself and the soil for signs of mealybugs and their eggs. Minor mealybug infestations can be treated by dipping a cotton swab in rubbing alcohol (70% isopropyl alcohol) and then touching any visible insects. Major mealybug infestations require a more drastic approach. Spraying neem oil or Leaf Armor on the leaves and stems consistently can sometimes treat a heavy mealybug infestation. Neem oil is non-toxic to people, so we prefer to start with neem oil first. If neem oil is not effective, you can use a chemical pesticide designed to target mealybugs.

Other Issues

Neck or Stem Forming: As African violets grow, lower leaves die and fall off. Over time this can lead to a long stem or neck that elevates the crown of the plant well above the soil line making it less attractive and more easy to topple. To eliminate the neck, simply repot the plant and set it low in the container burying the stem all the way up to the lowest set of leaves.

Why African Violets Stop Blooming

Sometimes African violets stop blooming. Lack of light, water, fertilizer, or even waiting too long to repot can all cause African violets to stop blooming. To encourage African violets to bloom, you must figure out which area of care is lacking. Once you address that problem, your African violet should resume blooming again.

By understanding these common issues and their solutions, you can keep your African violets healthy and blooming beautifully.