The best time of the year to apply post-emergent herbicides is in early to late spring, when weeds are small but actively growing, as they will more easily absorb weed killer.
When should I post my emergent lawn?
- Apply post-emergent herbicides when temperatures are below 85 degrees F. …
- Wait until the soil temperature is above 55 degrees to apply post-emergents. …
- Do not mow your lawn up to 3 days before your post-emergent application or for 3 days after your application.
How long after pre-emergent Can I apply post-emergent?
Wait 4 weeks after pre-emergent application. If there is an abundance of weeds in your lawn, use this post-emergent to kill both broadleaf and grassy weeds at the same time.
