Spray plants with a strong stream of water
Remove heavily infested leaves or stems
Hand-pick aphids from plants
Apply insecticidal soap
Apply neem oil
Use horticultural oil
Introduce ladybugs or lacewings
Encourage beneficial insects
Control ants around plants
Avoid excess nitrogen fertilizer
Keep plants healthy and well-watered
Quarantine new plants before placing them near others
Repeat treatments regularly until aphids are gone