Ideal to use before the introduction of biological controls, perhaps while waiting for the residue of previous chemical sprays to dissipate. Soft Soap Concentrate reduces population and the breeding capabilities of Aphids, Whiteflies, Red Spider Mites, Thrips, Mealybug and Scale. Soft soap works by plugging up the breathing holes in the insects body, and also by sticking their wings and moving parts together. It is not a poison, so can be safely used on edible crops.
To use dilute as per the instruction on the bottle and spray onto affected plants, smaller plants could be dunked in the diluted solution. For infested plants you may need to spray daily for up to 10 days.
There are certain plants which can be damaged by Soft Soap - these include Fuchsia, ferns and bedding plants in bloom. Test a one or two leaves first if you are in doubt.