African violet leaves turning yellow: causes and what to do
17 results in the diagnosis tree begin with yellowing leaves, 7 of them marked likely when the answers fit. They are ordered here for African violet (Streptocarpus ionanthus), using what its sources say about soil moisture, light, soil, watering and feeding and one problem recorded for it.
Sources last read 14 September 2026.
Streptocarpus ionanthus is a species of Streptocarpus in the section Saintpaulia, commonly known as an African violet. It is native to eastern and southwestern Tanzania. Wikipedia, CC BY-SA 4.0
Native range: E. & SW. Tanzania (seasonally dry tropical). Also sold as Kenya Violet and Usambara violet.
What African violet’s sources say that bears on this
- Soil moisture
- Moist but well-drainedRHS · read 13 September 2026
- Light
- Medium lightClemson Extension · read 13 September 2026Partial shadeRHS · read 13 September 2026
- Soil
- Loam; pH Acid or NeutralRHS · read 13 September 2026
- Watering
- Water drains quickly through this mix. Water left sitting on the surface can make the plant decay.NC State Extension · read 13 September 2026In winter, water sparingly as the compost dries; in the growing season, water generously and let the compost dry between waterings. Feed every two weeks with a high-potassium fertiliser.RHS · read 13 September 2026
- Feeding
- In winter give little water as the compost dries; in the growing season water generously but let the compost dry between waterings. Every two weeks, give a high-potassium fertiliser.RHS · read 13 September 2026
How this shows up on a African violet
Lower leaves collapse and yellow within days of a watering
Colour goes before shape on a African violet. The lowest leaves on each stem yellow evenly, stay soft to the touch, and the compost two inches down is still wet from the last watering.
The source for this plant describes moist but well-drained soil. Compost that stays saturated loses the air spaces fine roots grow into, and those roots die back first.
Telling it apart: Weigh the pot in your hand. A pot still heavy a week after watering is holding more water than the roots are using.
RHS · read 13 September 2026Possible causes, likeliest first for a African violet
Most likely too much water
Ranked higher because African violet's recorded problems point this way.
- Moist but well-drained RHS · read 13 September 2026
- Loam; pH Acid or Neutral RHS · read 13 September 2026
Why: Soil that is wet two inches down, under leaves that are yellowing from the bottom or falling, points at roots that cannot breathe.
What to try:
- Hold off watering until the top two inches of soil are dry, and check again with a finger rather than by the calendar.Useful: moisture meter
- Empty any water standing in the saucer or the outer pot within half an hour of watering.Useful: pot with drainage holes
What would settle it: Lift the african violet out of its pot. Healthy roots are firm and pale; roots that have been wet too long are brown, soft and smell sour.
Most likely cold
Ranked higher for African violet because of what its sources say.
Its RHS hardiness rating puts this plant's cold floor at 15°C or above, so a cold windowsill at night is a strong explanation.
- H1A — warmer than 15°C RHS · read 13 September 2026
Why: Soft, dark patches rather than crisp ones are damaged tissue rather than dried tissue.
What to try:
- Move it away from the glass at night, or keep the curtain on the room side of the african violet.
- Leave damaged leaves until new growth appears, then remove the worst of them.
What would settle it: Where the african violet sits at night, and what the glass feels like at that hour. Damage that appeared after one cold night, on the side facing the window, is the pattern.
Most likely too little water
- Moist but well-drained RHS · read 13 September 2026
Why: Soil dry two inches down, under lower leaves that are yellowing or leaves that are falling, is a african violet shedding what it cannot support.
What to try:
- Water until it runs from the drainage hole, then let the pot drain.Useful: pot with drainage holes
- If the water runs straight through a shrunken rootball, stand the pot in water for twenty minutes so the compost can take it up.
What would settle it: Water it thoroughly and look again the same evening. A thirsty plant firms up fast. One that does not has a root problem rather than a water problem.
Less likely for a African violet, still possible
- Most likely not enough light
- Most likely short of nutrients
- Most likely a build-up of salts in the soil
- Nutrients are an unlikely explanation here
- Possibly root rot, in a pot that has stopped draining
- Probably too much water, but this is not settled
- Probably too much water
- Possibly too much direct sun
- Possibly too much direct sun, or feeding
- This may be ordinary leaf loss
- Light and feeding are both plausible, and this does not separate them
- Possibly dry air
- The answers do not point at one cause
Questions
- What usually causes yellowing leaves on a African violet?
- For African violet: most likely too much water, most likely cold and most likely too little water.
- How can I tell which one it is on my African violet?
- Where is the yellowing? The lowest leaves, working upward; New growth at the top, while older leaves stay green; Between the veins, the veins themselves still green; At the leaf tips and edges, browning as it goes; Patchy, only on the side facing the window.
- What do African violet's sources say about its soil moisture?
- RHS: Moist but well-drained.
- What does this look like on a African violet?
- Colour goes before shape on a African violet. The lowest leaves on each stem yellow evenly, stay soft to the touch, and the compost two inches down is still wet from the last watering. Telling it apart: Weigh the pot in your hand. A pot still heavy a week after watering is holding more water than the roots are using.
Other plants that show yellowing leaves
Goldfish plantPale, undersized leaves at the tips of the stems
Lipstick plantBuds that yellow and drop on a leafy plant
Barberton daisyWrinkling rather than yellowing
Bearded irisFaded, yellow-white areas on the sunny side of the plant
Bigleaf hydrangeaPale dry areas across the upper leaves only
Bird of paradiseFaded, yellow-white areas on the sunny side of the plant
Something else wrong with the African violet?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.