Aphids: How to Control Them Without Harming Wildlife
Owen Petrakis · Sep 10, 2026 · 5 min read
Quick answer
Greenfly and blackfly multiply fast, but natural predators and simple methods usually keep them in check.
Aphids are small sap-sucking insects that cluster on soft new growth. They can distort leaves, spread plant viruses, and leave sticky honeydew that turns black with sooty mould.
A few aphids are normal and feed birds and beneficial insects. The aim is control, not total elimination.
1 Hand methods
Squash small colonies between finger and thumb, or knock them off with a strong jet of water. On houseplants, rinse the plant in the shower or wipe leaves with a damp cloth.
2 Encourage predators
Ladybirds, lacewings, hoverflies, and small birds eat huge numbers of aphids. Avoid broad-spectrum pesticides that kill these predators, and grow flowers such as calendula and yarrow to attract them.
3 Gentle sprays
If an infestation is heavy, insecticidal soap or plant-oil sprays work on contact. Spray in the evening when bees are less active, coat the undersides of leaves, and repeat after a week.
4 Reduce future outbreaks
- âś“Avoid overfeeding with high-nitrogen fertiliser
- âś“Check plants weekly in spring when aphids build up
- ✓Watch for ants “farming” aphids and disrupt them
- âś“Grow sacrificial plants like nasturtiums to draw aphids away
This is general gardening information. Results depend on your climate, soil, and conditions. Follow label directions for any fertiliser or treatment, and check whether plants are toxic to pets or children before bringing them home.