Posted: 25/07/2014 at 06:25
Fill a washing up bowl with tepid water and a good squirt of washing up liquid (Ecover is best but anything will do at a push).
Pick your plants up, putting your fingers across the top of the pot either side of the stem and turn it upside down - immerse the plant in the water and swoosh it gently back and forth - drowning and washing off the aphids while not getting the compost wet - and then stand your pots back upright to drain.
I do this when my potted herbs get aphids.
It works for whitefly too!