Otto from Calgary writes
Per the product label: GrazonNext HL provides preemergence control of germinating seeds or emerging seedlings of susceptible weeds and re-growth of certain perennial weeds following application. When to apply depends on your application type, either as a pre-emergent (before seeds germinate) or post emergent application (anytime weeds are actively growing). You may contact your local cooperative extension office to determine the correct timing of the application as this will vary greatly from region to region or search online for best time to apply in (your area) for weed prevention. A lot of universities have great articles for this.
Answer last updated on: 09/18/2018
