While some insecticides can be used on plants, it is important to read and follow the label instructions carefully. Some products may be harmful to certain types of plants or may require a waiting period before harvesting any edible crops. In the case of Ortho Home Defense, the insecticides found in the product are not harmful to plants, but it should be kept off of and outside the dripline of any edible vegetation such as a vegetable garden, herbs, or fruit trees.