8. Treat Your Yard
The outside yard will also need to be kept free of debris (piles of leaves, etc.) to help reduce places for fleas to congregate. Planting certain herbs and plants, such as lavender, eucalyptus, fennel, marigold, in the yard may help direct fleas away from your property, and using cedar chips around the yard, especially areas where your pet spends time, can help keep fleas at bay. Food-grade diatomaceous earth can also be used to treat the yard without chemicals. It acts as an abrasive and drying agent, much like boric acid does. Just keep in mind that you may need to reapply it after a particularly heavy rain as it can be washed away. But excessive rain and flooding of the infected areas can also help wash away the eggs and larvae.