Most botanists would define an herb as a plant that dies back to the ground each year without forming woody stem tissue. This definition limits the number of plants technically called herbs. Most gardeners include plants that have culinary, medicinal, aromatic, or ornamental uses. This definition would include lavender, rosemary, and bay, which form woody stems.

Internet websites and social media platforms often contain information that misguide the public in using homemade pesticides. The use of homemade pesticides is concerning for several reasons. Homemade pesticides do not have directions for safe handling and application, instructions on how to protect people, pets, plants, and the environment, and are often ineffective. This publication will explain what homemade pesticides are and how they differ from registered pesticides. It will also debunk several common myths about homemade pesticides.