Safer Brand Insect Killing Soap With Seaweed Extract utilizes the power of potassium salts of fatty acids (insecticidal soap). The potassium salts weaken the insect’s waxy protective outer shell. Apply every 5-7 days when insects are present or as needed to prevent further damage. Works for aphid control and mealybug control as it dehydrates the insect by breaking down its waxy membrane. It is a contact killer, several applications may be needed for full control. As a general rule, much like watering, do not use these products in the peak of the day or when temperatures exceed 90 degrees F to avoid wilting or browning of the leaves. Kills insects yet is gentle on plants. This product will not persist in the environment, and can be used up until the day of harvest.