Hello Peter when is the best time to spread crab grass preventer down also got rid of most of my weeds except these patches of green leaves that look like heart shape1 to 2 inches wide
Crabgarss preventer goes on is spring around the time that the forsythia bushes bright yellow flowers are falling to the ground (right when the very first lilac flowers are opening. A great time to kill broadleaf weeds is coming up in September once daytime highs drop below 85°. A weed killer spray is the most effective weed killer since the weeds absorb the weed killer through their leaves.