How to Get Rid of Aphids

Last updated: November 2026

To get rid of aphids, knock them off with a strong spray of water, follow with insecticidal soap or horticultural oil on the colonies you can still see, and protect the ladybugs, lacewings and parasitic wasps that keep aphids in check.^1,7 Repeat every 5 to 7 days for two to three weeks, because aphids reproduce faster than almost any other garden pest.^1,2

The plan below works for vegetable beds, ornamentals, fruit trees and greenhouses.

How to recognize an aphid problem

Aphids are soft-bodied insects about 1 to 3 mm long, usually green, black, gray or pink.² They cluster on new shoots, flower buds and the undersides of young leaves, where they feed on sap.^1,2 Look for:

• Curled, puckered or yellowing new leaves.¹
• Sticky honeydew on leaves, cars or patio furniture below the plant, often followed by black sooty mold.^1,2
• Ants running up and down stems. Ants farm aphids for honeydew and chase away their predators.^1,7
• White cast skins on leaves after each molt.²

For species, host plants and photos, see our aphid profile.

Why aphid numbers explode

In spring and summer, most aphids are females that give birth to live young without mating.¹ A newborn nymph can start producing young of its own in about a week in warm weather, so a few aphids on a shoot can become a dense colony in two to three weeks.¹ Lush, nitrogen-heavy growth speeds this up.^1,2 That is why early, repeated action matters more than any single spray.

Step-by-step plan

1. Inspect twice a week from late spring, turning over young leaves and checking buds.¹ Catching the first colonies is the cheapest control there is.
2. Prune or rub off heavily infested tips and drop them into a bag of soapy water.¹
3. Hose them off. A firm stream of water in the morning dislodges most aphids, and few find their way back to the plant.¹ Repeat every two to three days.
4. Spray soap or oil on remaining colonies. Insecticidal soap and horticultural oil work on contact only, so cover leaf undersides thoroughly.^1,4 Apply in the cool of the evening and repeat after 5 to 7 days.^1,4
5. Control the ants.¹ Band trunks or stems with a sticky barrier or use ant baits away from the plant, so predators can reach the colonies.^1,7
6. Feed predators, not just plants. Plant flowers with small blooms (alyssum, dill, yarrow, buckwheat) nearby to keep hoverflies, lacewings and parasitic wasps in the garden.^7,8
7. Cut back on quick-release nitrogen while aphids are active, and water deeply instead of often.¹

Comparing aphid control options

Broad-spectrum sprays such as pyrethrin knock aphids down quickly but also hit ladybugs and other beneficial insects, which often leads to a bigger aphid rebound a few weeks later. Keep them for severe outbreaks where gentler options have failed.¹

Aphids in greenhouses

Greenhouses give aphids warmth and shelter with no rain or natural predators, so populations build year-round.² Growers rely on biological control: parasitic wasps such as Aphidius colemani for small aphid species, Aphidius ervi for larger ones, and lacewing or ladybug larvae for hot spots.³ Release them early, at the first aphids, rather than after colonies are established.³ Yellow sticky cards help you monitor winged aphids arriving from outside.² Combine this with the monitoring routine in our integrated pest management basics.

When to start

US searches for aphid help peak in May and June, but the best time to act is earlier. On fruit trees, a dormant oil spray in late winter reduces overwintering eggs.^1,5 In vegetable beds, start inspecting as soon as new growth appears in spring, and plan for a second wave when winged aphids move in during early summer.^1,2