Preen Extended Control Weed Prevent, 21.45lbs (Covers 3,500 Sq Ft)

Prevent Weeds in 4 Easy Steps For Up to 6 Months, Guaranteed. First, remove existing weeds and roots, mulch the area, sprinkle Preen on top of the mulch and water to activate. Preen Extended Weed Preventer creates a barrier beneath the surface that stops weeds from growing. Preen can be used around 600 established plants, so it is perfect for preventing weeds in your landscape beds. Preen is not for use around edible or food producing plants. It works best if applied in the spring before weeds start growing, but can also be applied any time of year. With Preen, you will be free to enjoy a beautiful, weed-free landscape.