Preen® Garden Weed Preventers control grass weeds and other weeds, feed plants and help yield a neat, professional landscape. The Preen® solution to garden weed control is keeping weed seeds from germinating and growing. ... Preen® weed and feed products nourish plants while eliminating the need for a garden weed killer.

Is Preen natural weed preventer safe?

Preen Natural Vegetable Garden Weed Preventer is safe for use around established vegetables, herbs, fruits, annuals, perennials and other plants.

What fertilizer prevents new weed growth?

Corn gluten meal is a corn byproduct that can provide nitrogen to your soil while preventing weeds from sprouting. It doesn't kill weeds that have already grown, but it stops more from sprouting under the soil. Add it each year in the spring; it gets more potent over time.