Aphids – What is the best way to control them?

Question

They are mostly on the underside of leaves and are hard to spray, but I don’t want to use insecticides in my garden.

Answer 1

Without an insecticide of some sort, even if a natural one , aphids will completely destroy your plants. There are many non-toxic pesticides that are organic, or that you can make from ingredients that are likely in your kitchen, but I'm afraid that without some sort of insecticide, you will have to start over next season, unfortunately.