Spring: crabgrass pre-emergent and weed control
Spring starts with a pre-emergent to stop crabgrass and broadleaf treatment for dandelions and clover.
Two rounds open the year, in this order:
- The crabgrass preventer goes firstA "pre-emergent" goes down on the soil before the weed seed sprouts, which is how a seasonal treatment program begins. The UMass Extension fact sheet on crabgrass biology and management explains why the timing matters.
- Then the wide-leaved weeds"Broadleaf weed control" goes after the rosettes and runners already growing in the turf, aimed at those plants where they stand.
We treat lawns for weed trouble on this calendar every spring.
lawn weed control