With kids and pets ripping through the house like a runaway stampede, the last thing a frazzled mom needs to worry about is dangerous pesticides within easy reach of her family. You can’t win arguments with invading insects, so you’ve got to treat infested houseplants with something that annihilates bugs. Meanwhile, that “something” can’t be dangerous to little fingers that might come into contact with the treated plants. Make a safe, effective solution to kill bugs in houseplants with the old-timey stuff your grandma may have used for practically all her cleaning tasks. You can use gentle, harmless Castile soap to salvage bug-ridden plants -- as well as your sanity.
Water your buggy houseplant the day before you treat it with the homemade solution.
Pour 2 cups of water into a plastic spray bottle. Add 1 tablespoon of liquid Castile soap. Invert the sprayer gently five or six times to combine the soap and water without creating excessive suds. Use the solution the same day.
Set the affected houseplant in the shower. Spray all the plant’s surfaces to coat them thoroughly with the solution, but not enough to produce runoff. Pay special attention to the undersides of the leaves, where bugs like to run and hide.
Leave the plant in the shower to allow the soap to do all the dirty bug-killing work for you.
Rinse all traces of the soap off the houseplant two or three hours later to minimize the possibility of leaf injury.
Discard any leftover insecticidal soap solution.
Repeat the treatment five or six days later. Re-treat houseplants immediately if new bugs arrive.