Gardeners have trusted Preen weed preventer products to help keep their garden and landscape beds weed-free for months. Preen Extended Control™ weed preventer is the longest lasting Preen yet, stopping weeds for up to 6 months per application. It's labelled for use around 600 plants in perennial flower beds, around groundcovers, trees and shrubs and in xeriscape settings and rock gardens. Preen Extended Control™ weed preventer tackles many of the toughest weeds a gardener faces, including, dandelions, crabgrass, field bindweed, white clover, chickweed, henbit, purslane, Carolina geranium, stinging nettle, horseweed or marestail, oxalis, spurge, lambsquarters and more. Preen's jug-handled bottle with a flip-top applicator cap makes Preen Extended Control™ weed preventer easy to apply. Simply flip open the top, tilt the bottle and start shaking it to evenly distribute the product granules on top of soil or mulch. Water in the treated area to activate the protective weed barrier. That's all it takes to stop listed grassy and broadleaf weeds for up to six months. Best of all, by applying Preen Extended Control™ weed preventer just 2X per year you can get year-round protection from new weeds.