Spruce Weed & Grass Killer is the hard working, worry-free weed solution. Spruce is a fast-acting weed killer that works on contact, with visible results in 1 hour. The powerful formula works differently than most weed killers, using dehydration to kill weeds. Spruce is safe for use around people and pets when used as directed. Spruce is also backed by the Good Housekeeping seal. Spruce kills all types of weeds and grasses, including dandelions, large crabgrass, white clover, dollarweed, and morning glory. This 64oz refill is designed for use with the Power Wand or Manual Sprayer - no mixing or pouring necessary. To use, simply squeeze the top of the empty bottle and remove it, snap in the refill, and spray! The 64oz bottle can treat up to 400 weeds, and should be sprayed on the entire plant, not just the root.