I use purpleinopp's process. I don't know she must have meaner ants than I have because they come running out and floating on the top when it dunk my plants.
I hate to say this but I have had houseplants that go outside for over 20 yrs and have never, I mean never had any bugs not mealy, aphid or gnat or anything else. But I water very little also. Plants get a sip once a month. Soil is never soggy.
NOw I will find a piece of wood to knock on.
This may help it is what I do..
In a gallon of water
1/2 cup peroxide
1 cap of rubbing alcohol
2 drops of liquid detergent
Put this mixture in a squirt bottle. Wet them down. Keep them in the shade. Then I hose them off after 24 hours for the big plants and soak the small plants in a bucket of water.
I soak my plants in a bucket of water so any bugs in the soil float to the top. I get those rolly polly bugs in my soil.
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