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Check these first
- Check the soil moisture level.
- Inspect the drainage holes for blockages.
- Look for signs of pests on the undersides of the leaves.
Likely causes
Overwatering
Most likelyHow to tell: The lower leaves turn yellow and the soil stays soggy for days.
What to do: Allow the top inch of soil to dry out completely before watering again. Ensure your pot has drainage holes to prevent water from sitting at the roots.
Nutrient deficiency
PossibleHow to tell: Older leaves turn pale yellow while the veins remain green.
What to do: Apply a balanced liquid fertilizer diluted to half strength. Feed the plant every 2 to 4 weeks during the active growing season.
Find out what's wrong with your red 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.
Scan with your phone's camera to get the app
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When to worry
It is normal for the very bottom, oldest leaves to yellow and drop as the plant grows. Worry only if the yellowing spreads to the younger leaves.
Stopping it coming back
Use a well draining potting mix and avoid letting the plant sit in standing water.
Red Amaranth: yellow leaves? Check yours with a photo
Every plant is a little different. Take a photo of your red 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Should I remove the yellow leaves?
- Yes, you can snip them off with clean scissors. This keeps the plant looking tidy and prevents potential rot.
- Could it be a disease?
- Yellowing is rarely a disease in this plant. It is almost always related to how you are watering or feeding it.
More problems with Red Amaranth
- Why is my Red Amaranth drooping?
- Why is my Red Amaranth looking leggy?
- Why are there bugs on my Red Amaranth?
- Why are my Red Amaranth leaf tips turning brown?
- Why is my Red Amaranth losing its leaves?
- Why does my Red Amaranth have spots on its leaves?
- Why is my Red Amaranth showing signs of root rot?
- Why are my Red Amaranth leaves curling?
Back to the Red 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.