I put down Scotts with Halts in early April, as per the instructions. That meant I couldn't seed this spring, but I figured at least I'd lessen my crabgrass problem. I look at my lawn this weekend, and whaddaya know? Crabgrass growing in exactly the same places it did last year, only I think it has even arrived a bit sooner.
Has anyone else experienced this? Did I time it wrong or does this stuff just not work as advertised?
Thanks
FWIW, I too have suffered an invasion of crabgrass this year... perhaps enviormental factors were optimum this year...
Dave
If the soil is disturbed, the pre-emergence effect will be diminished. Yank out what you can by hand and prevent the damn stuff from seeding. After the intense summer heat has subsided, get some quality seed and protective straw over it and keep it moist. Next year use the pre-emergence the same week you see the first dandilion bloom (in your neighborhood), then apply the preemergence AGAIN after 90 days. The following year you may only need to use the preemergence one time, depeneding how thick your grass has grown. My lawn no longer grows crab grass very well--it's just too thick and chokes out most weeds, but I overseed every fall.
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