Stuuuuuuu wrote:
Sabres2Sabres wrote:
Dig it out, plant new grass?
Once you get rid of it the best thing to do is make sure it doesn't come back. Small patches are easy to get rid of.
Bingo. I'm a bit of an environmentalist granted, but my though is if you care about your lawn so much, why use an herbicide on it? Yes, it's much, much easier than physically removing the weeds. But I don't believe that weed killers aren't going to hurt your lawn and end up in your ground water. Might be time for the garden weasel.
most herbicides that are sold in stores take less than a day to chemically break down into safe components. though environmentalists favor pulling and keeping it away, it is far from effective, because whether the weed grows vegetatively or through seed, it will do that better than most people can keep up with.
your best bet, really, depending on your economic situation, is to till it all up or spray all of your infiltrated area, plant new grass, and spend the summer pulling what's left. then next year your lawn should be better. also remember that fertilizer is a waste once the grass grows past the seed stage. photosynthesis creates the food, and the added nutrients really will poison water quality downstream.
it sucks that crabgrass's pH tolerance is wider than most ornamental grasses...because then you can't modify your o/a horizon of soil to prevent crabgrass growth.
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