basic hero arrow

Insecticidal Soap

Kirk’s remedies and recipes are suggestions provided by customers like you and are in no way guaranteed to work for all.

Kirk’s will help keep pests out of your garden. For more than 100 years, southern gardeners have relied on Kirk’s Castile soap as an all-purpose fungicide and insecticide that won’t harm the environment. Dissolving this nontoxic soap in water is a safe, effective way to get rid of fungi, aphids, mealy bugs, spider mites, and much more. Kirk’s recommends that you try a small test patch before use.

Courtesy of the St. Petersburg Times Tampa Bay.


Spray Bottle: Use any clean spray bottle or garden sprayer.

Castile Soap: The active ingredient in insecticidal soap comes from the fatty acids in vegetable oils. So, it’s important to use the real thing, such as Kirk’s 3-in-1 Head to Toe Nourishing Cleanser.

Water: Tap water is perfectly fine for making insecticidal soap.



  1. Mix together 1 tablespoon of soap to 2 cups of water.
  2. Pour into the spray bottle.

featured product

additional tips

The best time to spray insecticidal soap is early morning or evening when temperatures are cool so the plant will stay wet longer. Apply thoroughly and be sure to check the undersides of leaves. Insect infestations often require a second treatment with insecticidal soap in about one week. Wash vegetables and fruit before eating.

The owner of this website has made a commitment to accessibility and inclusion, please report any problems that you encounter using the contact form on this website. This site uses the WP ADA Compliance Check plugin to enhance accessibility.