06/14/2019
Pre-emergent herbicides, or w**d preventers, control crabgrass and other w**ds by stopping their seeds from germinating. An application early in the growing season works wonders; it's like vaccinating your lawn against w**ds.
The right time: Apply preventer when forsythia blooms drop.
Why timing matters: W**d preventers are not effective against w**ds that have already begun to grow, so you must apply them before germination to gain any benefit. Crabgrass, the primary target of lawn w**d preventers, normally germinates just after forsythia blooms, so take your cue from Mother Nature. When you notice forsythia bushes dropping their blossoms (March to May, depending on your region), apply w**d preventer, and water as soon as possible to activate it.
