Best Time to Spray Weed Killer for a Healthy Lawn
For most lawn weed killers, the best time to spray is after morning dew has dried or in early evening on a calm, dry day, with temperatures roughly 65°F to 85°F and no rain expected. Use post-emergent sprays when weeds are young and actively growing, use pre-emergents before weed seeds sprout, and never use regular Roundup or weed-and-grass killer inside a lawn unless you are willing to kill the…












