Short answer
African Violet leaves typically drop due to crown rot from overwatering or water collecting at the base of the stems. The most effective fix is to ensure the plant is watered from the bottom, keep the crown dry, and provide well-draining, loose soil.
When an African Violet begins dropping leaves, it is often a sign that the delicate neck of the plant is suffering from moisture-related stress or rot. While losing an occasional old, outer leaf is a normal part of the aging process, a sudden collapse of multiple leaves warrants immediate attention as it suggests the plant's structural integrity is compromised.
Crown rot occurs when water sits in the center of the leaf rosette, causing the tender stems to decay at the base. Because African Violets have fuzzy leaves that trap moisture, any water touching the crown quickly leads to bacterial or fungal breakdown.
Check: Check the base of the dropped leaves; if they are mushy, blackened, or slimy at the attachment point, it is definitely rot.
Fix: Remove the affected mushy leaves immediately, repot into fresh, well-draining African Violet mix, and ensure future watering is done exclusively from the bottom using a tray.
African Violets are sensitive to dramatic moisture swings, causing the plant to prioritize its central growth over older foliage. If the soil becomes bone-dry and then heavily saturated, the sudden turgor pressure change can cause petiole snapping.
Check: Check if the soil feels excessively compacted or if the potting medium has pulled away from the edges of the pot.
Fix: Establish a consistent routine where you water once the top inch of soil feels slightly dry, preferably using self-watering pots designed for Saintpaulia.
As Saintpaulia matures, it naturally develops a 'neck' or woody stem as it sheds older leaves from the bottom. This is a physiological process rather than a disease, and the plant remains otherwise vigorous and healthy.
Check: Inspect the dropped leaves; if they look yellowed or crispy rather than mushy and black, and the crown remains firm and green, it is likely natural shedding.
Fix: No action is needed, though you can eventually repot the plant deeper, burying the neck to encourage new root growth along the stem.
When to worry
You should be concerned if the central crown becomes soft or blackened, as this indicates the rot has reached the heart of the plant and recovery may be impossible.
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Diagnose my African VioletNo, you should never mist African Violets. The fuzzy leaves trap water droplets, which leads to crown rot and unsightly spotting.
The best method is to bottom-water by placing the pot in a saucer of water for 20 minutes. If the top of the soil feels slightly damp afterward, the plant has absorbed sufficient moisture.
If the crown has rotted, you can sometimes save the plant by cutting off a healthy leaf with a sturdy stem and rooting it in water or moist vermiculite to start a new plant.
Consistent with guidance from: African Violet Society of America, University of Missouri Extension Horticultural Guide.