If you have fleas inside your home, chances are you have fleas outside as well. Fleas will invade the yard and garden, making it difficult to work outside as the fleas continue to bite. You may want to get rid of them by using natural products or chemicals. The process will take a few weeks, but eventually you will see the fleas disappear.
Plant flowers to keep fleas from coming into your garden. Such plants as lavendar, pennyroyal, and wormwood will not only keep fleas out of the garden, but keep out other unwanted insects such as whiteflies. Once the plants are planted, water the garden. Water will disrupt the fleas and bring them towards the top of the soil.
Spread a flea-killing substance such as diatomaceous earth, boric acid, or silica aerogels onto your garden. Diatomaceous earth will help kill fleas that exist in your garden by dehydrating the fleas. Boric acid and silica aerogels are powder-like flea killers. If you use one of these, sprinkle the chemicals evenly onto the garden soil. Whichever substance you choose will need to be repeated within the next week or two.
Spray nematodes into the soil of the garden with a nematodes sprayer. Nematodes are microscopic organisms that feed on fleas and other insects that can harm your plants. They are harmless to humans and pets. This is one of the most natural ways to kill fleas in your garden and have a long lasting effect in killing fleas.
Spray an insecticide such as chlorpyrifos insecticide. There are several kinds of chlorpyrifos insecticides including dursban. This product will not only kill fleas but other unwanted insects such as aphids. Spray the insectide onto the garden and repeat the treatment as directed. Chlorpyrifos attacks the nervous system of insects. You may not want to use this product if you have any pets.
Nematodes can be bought online.