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slender amaranth · Amaranthus viridis

Why is my slender amaranth showing signs of root rot?

It is less common for slender amaranth to get root rot, which usually happens when the soil stays soggy for too long. Check your drainage holes first to ensure water is not pooling at the bottom of the pot.

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

Check these first

  1. Check if the pot has drainage holes.
  2. Smell the soil for a sour or rotten odor.
  3. Gently lift the plant to inspect the roots.

Likely causes

  1. Overwatering

    Possible

    How to tell: The leaves turn yellow or brown and mushy, and the plant has a distinct musty smell. The roots will look dark and slimy instead of firm and white.

    What to do: Stop watering immediately and let the soil dry out completely. If the rot is severe, take the plant out of the pot, trim away the black mushy roots, and repot it in fresh, well draining soil.

  2. Poor drainage

    Possible

    How to tell: Water sits on the surface of the soil for a long time after you water. The plant looks stunted and stops growing.

    What to do: Ensure your pot has holes at the bottom. Use a potting mix amended with perlite to help water move through the soil more quickly.

Root rot in other plants

Find out what's wrong with your slender amaranth

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 stem base feels soft or mushy, the rot has likely spread too far to save the plant. Some wilting after repotting is normal as the plant settles in.

Stopping it coming back

Always empty the saucer under the pot after watering so the plant never sits in standing water.

Slender amaranth: root rot? Check yours with a photo

Every plant is a little different. Take a photo of your slender amaranth 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 just water less to fix root rot?
If the rot is just starting, letting the soil dry out might help. If the roots are already mushy, you must remove the damaged parts.
Does this plant need special soil?
It prefers a light, well draining potting mix. Avoid heavy garden soil that holds too much moisture.

More problems with slender amaranth

Back to the slender amaranth 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.