Yes, neem oil is effective against aphids. Apply it in the evening to avoid burning the leaves in the sun.

Will these bugs kill my plant?

If left untreated, a large infestation can severely weaken or kill the plant. Catching them early is the best way to keep your amaranth thriving.

Why are there bugs on my slender amaranth? Causes and fixes

Check these first

Inspect the undersides of leaves for clusters of tiny insects.
Check the stems for sticky residue.
Examine the plant for signs of wilting or stunted growth.

Likely causes

Aphid infestation
Most likely
How to tell: You will see tiny green or black insects congregating on the newest leaves and stems. They often leave behind a sticky residue called honeydew.
What to do: Spray the plant with a strong stream of water to knock them off. If they persist, apply insecticidal soap every 5 days until they are gone.
Environmental stress
Possible
How to tell: Plants that are not getting enough sun or are struggling with irregular watering are more attractive to pests. The plant will look generally weak or wilted.
What to do: Move your plant to a spot with full sun. Ensure you are watering every 2 to 4 days when the top inch of soil feels dry.

Pests on 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.

When to worry

Be concerned if the leaves start to curl or turn yellow from the sap loss. A few bugs are manageable, but a full colony can stunt your plant quickly.

Stopping it coming back

Keep your plant healthy with consistent watering and plenty of direct sunlight. Check the leaves weekly for early signs of visitors.

Slender amaranth: pests? 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.

Get the app · Or check it from a photo now, free

Questions people ask

Can I use neem oil?: Yes, neem oil is effective against aphids. Apply it in the evening to avoid burning the leaves in the sun.
Will these bugs kill my plant?: If left untreated, a large infestation can severely weaken or kill the plant. Catching them early is the best way to keep your amaranth thriving.

Guides to these causes

Aphids

Why are there bugs on my slender amaranth?