Pocket Botanist
Check these first
- Check the drainage holes for blockages.
- Smell the soil for a musty or sour odor.
- Inspect the roots for a slimy or black appearance.
Likely causes
Poor Drainage
Most likelyHow to tell: The soil stays soggy for days and the base of the stems feels mushy or soft. You might also notice a sour or swampy smell coming from the pot.
What to do: Repot the plant into a container with plenty of drainage holes using fresh, well draining potting mix. Trim away any black or slimy roots with clean scissors before replanting.
Overwatering
PossibleHow to tell: The leaves turn yellow and wilt even though the soil is wet. The plant stops growing and looks generally unhappy.
What to do: Adjust your watering schedule to every 2 to 4 days, ensuring the soil stays damp but not swampy. Always touch the top inch of soil before adding more water.
Find out what's wrong with your bristly lady's thumb
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
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When to worry
If the stems are turning black at the base, the rot is advanced and the plant may be difficult to save. It is normal for a few older leaves to yellow as the plant grows.
Stopping it coming back
Use a pot with drainage holes and avoid letting the plant sit in a saucer full of standing water.
Keep your bristly lady's thumb healthy from here
Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.
Questions people ask
- Can I save a plant with root rot?
- Yes, if you catch it early. Trim the dead roots, repot in fresh soil, and be careful not to overwater while it recovers.
- How damp should the soil be?
- The soil should feel like a wrung out sponge. It needs to be consistently moist but never dripping wet.
More problems with Bristly lady's thumb
- Why are there tiny bugs on my Bristly lady's thumb?
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- Why is my Persicaria longiseta dropping leaves?
- Why are my Persicaria longiseta leaves curling?
Back to the Bristly lady's thumb guide
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.