Spectracide weed and grass killer is a non-selective herbicide formulated to quickly kill grass and weeds including the root. Visible results in 3 hours. Effective, kills over 155 varieties of broadleaf and grassy weeds as listed. Area may be replanted in 7 days. Rainfast in 15 minutes. Protect desirable plants and vegetation with a piece of plastic or cardboard. Works only when it contacts foliage and deactivated when it hits the soil, making it ideal for use around flowers, shrubs, and trees.