sooby said:'I spoke to several State professionals and they said treat it fall, spring, summer -- fall, spring, summer -- till it is gone"
Surprising, I would have said that sounds more like a schedule for quackgrass rather than crabgrass.
There is no control for quackgrass unless you are going to use a complete vegetation killer.
Out side of quackgrass spreading into flower gardens, which is a major pain in the buttocks; quack grass will form or simply become part of lawn grass, up here any way.
I put blue grass sod out by my alley two years in a row to watch it turn most dead brown in warm dry weather, even with watering, so this year I was going to pull it up and resod again but saw that quackgrass which was, as the sodder told me probably already in there began to spread and now it is starting to look more pasture sod.
I will let it go and if it looks decent next spring just let it go.
My neighbors along the alley is strictly quackgrass and does not look bad at all but I dug the dandelions and a few other weeds out of it also.
Not as neat as genuine sod grass but can get thick enough to be lawn. I have a lot of it on the lawn edge and beyond as I said, it spreads where it is a problem in gardens, in the lawn unless you have a pure fescue lawn it is not worth the effort to deal with from my experience .
I have found one way to control it in gardens is dig down to the rhizomes, or if it is running along a wall or foundation, dig real deep to the brown root , I had it running along the house foundation about 12 inches deep once, and paint it with systemic weed killer.
A lot of work but if you keep at it better than digging up the whole garden and probably missing a broken rhizome piece that will quickly present you with the same problem all over again.
