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Preen Lawn Weed Control Plus Crabgrass Preventer provides up to 5 months of weed control. This product kills over 200 broadleaf weeds like dandelions, clover, ground ivy, thistle, and chickweed, and prevents crabgrass and other undesirable annual grassy weeds.

Formulated to be effective with cool and warm season grasses, Preen Lawn Weed Control Plus Crabgrass Preventer can be applied in spring or fall.

Cool season grasses: Kentucky bluegrass, perennial ryegrass and fine and tall fescue.
Warm season grasses: Bahaigrass, Bermudagrass, buffalograss, centipedegrass, zoysiagrass, St. Augustinegrass (except ‘Floratam’).
Do not use this product on seedling buffalograss in the spring of the first year of establishment until the turfgrass is fully green and has established new roots.