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Aphids: Causes, Diagnosis & Fixes

Aphids are small, soft-bodied insects that cluster on new growth and leaf undersides, sucking sap and excreting sticky honeydew.

Quick diagnosis

Aphids reproduce rapidly but are among the easiest pests to treat. A combination of physical removal and soap sprays is usually sufficient.

가능한 원인

New Growth Attraction

Why: Aphids are drawn to tender, nitrogen-rich new growth, which is easier to pierce and feed on.

Signs to check: Clusters of small insects on stem tips, flower buds, and youngest leaves.

Over-Fertilization with Nitrogen

Why: Excess nitrogen produces soft, sappy growth that is highly attractive to aphids.

Signs to check: Lush, rapid foliage growth, aphids concentrated on the newest growth.

Introduction from Outdoors or New Plants

Why: Aphids can fly in through open windows or arrive on plants brought in from outside.

Signs to check: Aphids appeared suddenly, plant was recently moved indoors or near an open window.

확인 사항

1
Inspect shoot tips and new leaves for clusters of small insects
2
Check for sticky honeydew residue on leaves and surfaces below
3
Note the color of aphids — they can be green, black, brown, or pink
4
Look for cast-off white skins on leaves (aphid molts)
5
Check whether ants are present — ants farm aphids for honeydew

다음 단계

Blast aphids off with a strong jet of water in the sink or shower
Wipe off remaining aphids with a damp cloth
Spray with insecticidal soap, coating all surfaces including undersides
Apply neem oil solution for ongoing protection
Reduce nitrogen fertilizer to discourage soft, attractive growth

도움을 구할 때

Leaves are severely curled and distorted from feeding damage
Aphid population rebounds quickly after treatment
Sooty mold is growing on honeydew deposits

핵심 포인트

Aphids reproduce rapidly but are among the easiest pests to treat. A combination of physical removal and soap sprays is usually sufficient.

Frequently asked questions

What causes aphids in houseplants?

Aphids are small, soft-bodied insects that cluster on new growth and leaf undersides, sucking sap and excreting sticky honeydew. Common causes include new growth attraction, over-fertilization with nitrogen, introduction from outdoors or new plants.

How do I fix aphids?

Start by identifying the likely cause instead of applying every remedy at once. Blast aphids off with a strong jet of water in the sink or shower Wipe off remaining aphids with a damp cloth Spray with insecticidal soap, coating all surfaces including undersides

Track the problem over time

Plant care tracker

Keep care history and observations with the affected plant.

See how it works

Plant journal with photos

Document symptoms and compare changes over time.

See how it works

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Sources and review

Content last reviewed: September 4, 2026

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