Spray aphids off plants with a strong stream of water
Prune and discard heavily infested leaves and stems
Wipe aphids off with a damp cloth or sponge
Apply insecticidal soap to affected areas
Use neem oil on infested plants
Introduce beneficial insects like ladybugs or lacewings
Remove ants that protect aphids
Isolate infested plants from healthy ones
Check new growth and leaf undersides regularly
Repeat treatments until aphids are gone