Features

• Crabgrass is a broadleaf annual weed. It sprouts from seasonal seeds. Applying pre-emergent herbicides in spring controls crabgrass before it matures and produces seed heads.
  
  

Function

• Pre-emergent crabgrass herbicides contain chemicals that kill crabgrass as it sprouts into spring seedlings. The chemicals remain effective for weeks and continue killing seeds sprouting through the season.
  
  

Timing

• Use the pre-emergent crabgrass herbicides in early spring, usually in March, as they are only effective before seedlings grow into branching crabgrass. The products are not effective on mature crabgrass. In temperate climates, the herbicides may be applied in late winter.
  
  

Benefits

• Pre-emergent crabgrass herbicides target only crabgrass and do not affect regular turf or lawn grass.
  
  

Considerations

• Pre-emergent crabgrass herbicides may require a second application in late spring for full control.
  
  

Caution

• Follow all precautions on the pre-emergent herbicides. Some chemicals are hazardous if used improperly.