It is my understanding that crabgrass preventer should be applied before...
It is my understanding that crabgrass preventer should be applied before crabgrass seed germinates. My question is, specifically when is that in Harford County, MD?
Harford County Maryland
Generally speaking the best approach is to divide the recommended dose of crabgrass killer in two and apply half in mid March and half in mid May. If the ground is still covered with snow in mid March this year you might want to wait until the snow is gone. One approach is to put down their crabgrass killer when the forsythia is blooming. vw