2 teaspoons of Dr. Bronner's pure castile peppermint soap or another liquid soap, and a gallon of water. Place the solution in a spray bottle and apply it generously to all affected plants.

Dr. Bronner's Magic Soaps was founded in 1948 and is most famous for its pure-castile ... glycerin, soap, and water left behind after the alkali has reacted. Essential oils like peppermint ...