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Joyweed · Alternanthera polygonoides

Why is my Alternanthera rotting at the base?

Root rot is a common issue for Joyweed when the soil stays soggy for too long. Check the soil moisture and the drainage holes in your pot first.

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root rot on a plant
Photo: Ninjatacoshell, CC BY-SA 3.0

Check these first

  1. Feel the soil two inches deep to see if it is saturated.
  2. Inspect the drainage holes to ensure they are not blocked.
  3. Check the base of the stems for soft or discolored tissue.

Likely causes

  1. Overwatering

    Most likely

    How to tell: The stems turn mushy or black at the soil line and the plant wilts even when the soil is wet.

    What to do: Stop watering immediately and let the top inch of soil dry out. If the damage is severe, remove the plant from the pot and trim away any black, slimy roots before repotting in fresh, well draining soil.

  2. Poor Drainage

    Most likely

    How to tell: Water pools at the bottom of the pot or the soil remains heavy and dense for more than a week.

    What to do: Ensure your pot has drainage holes at the bottom. Mix perlite or coarse sand into your potting soil to improve airflow and drainage.

Root rot in other plants

Find out what's wrong with your joyweed

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 plant is in danger. It is normal for the plant to wilt slightly if it has been a few days since watering, but it should perk up quickly after a drink.

Stopping it coming back

Only water when the top inch of soil feels slightly dry to the touch, and never let the pot sit in a saucer of standing water.

Joyweed: root rot? Check yours with a photo

Every plant is a little different. Take a photo of your joyweed and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

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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 keep the plant in a bright spot with good airflow.
How often should I water my Joyweed?
Check it every 3 to 7 days. Keep the soil evenly moist but never swampy.

More problems with Joyweed

Back to the Joyweed guide

This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.