Organic Grub Control for St. Augustine Lawns

Dealing with grubs in a St. Augustine lawn doesn't require harsh chemicals. Two effective organic approaches can help you manage these pests while improving your soil health.

Milky Spore Disease

Products like Grub-X introduce milky spore disease (Bacillus popilliae) into your soil. This naturally occurring bacterium targets Japanese beetle grubs specifically. Apply granules evenly across the entire lawn according to package directions. Once established, milky spore can persist in the soil for years, providing long-term protection. You'll find this at most garden centers or farm supply stores.

Compost and Beneficial Nematodes

Quality compost does double duty: it encourages beneficial nematodes that prey on grubs while simultaneously fertilizing your lawn and improving soil structure. The effect is similar to a slow-release fertilizer that lasts for seasons. Source compost from a professional landscape supplier rather than bagged retail products. Request a nutrient analysis and confirm it was produced thermophilically (heated above 131°F) to ensure weed seeds and pathogens were destroyed.

Both methods work with nature rather than against it, building a healthier lawn ecosystem that naturally resists pest outbreaks.