Pocket Botanist
Check these first
- Smell the soil for a sour or rotten odor.
- Gently pull the plant from the pot to inspect the roots for dark, mushy sections.
- Check if the pot is sitting in a saucer of standing water.
Likely causes
Overwatering
Most likelyHow to tell: The leaves turn yellow and the stems feel mushy near the soil line.
What to do: Stop watering immediately and allow the top half of the soil to dry out. If the soil is soggy, repot the plant into fresh, well draining soil and trim away any black, slimy roots.
Poor drainage
PossibleHow to tell: Water sits on the surface of the soil for a long time after you water the plant.
What to do: Ensure your pot has adequate drainage holes at the bottom. Use a potting mix that includes perlite or sand to improve airflow to the roots.
Find out what's wrong with your alfalfa
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 and mushy, the rot has likely spread too far. It is normal for a few lower leaves to turn yellow as the plant ages.
Stopping it coming back
Only water when the top inch of soil feels dry and always empty the drainage saucer.
Keep your alfalfa 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?
- You can save it if you catch it early by removing the rotten roots and repotting in dry soil. If most of the root system is black, it is usually too late.
- Does alfalfa need special soil?
- Alfalfa prefers well draining soil that stays moist but not soggy. A standard potting mix with added perlite works well.
More problems with Alfalfa
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.