Joe wrote:
On Jul 11, 1:07 pm, "CL \"dnoyeB\" Gilbert" wrote:
Joe wrote:
I noticed that both of my neighbor's front lawns have crab grass that
are slowly making their way to mine, is there any way to form some
sort of barrier to keep them from getting on to my lawn? I heard rock
salt and water can kill crab grass is that true?
Whats wrong with crab grass killer? If your lawn is well managed, it should
be hard for that to infiltrate.

CL

I'd rather use non-toxic methods since my children play on the grass.
Any better options than hand raking?

If it's visible, it's too late for the pre-emergent, anyway, which
should have been applied in May-early June time frame (earlier/later
depending on your unstated location). Once it's applied and watered
in, there's no issue anyway.

After it's growing, topical applications aren't particularly effective
and will damage most other grasses as well (again, to a greater/lesser
degree depending on species, growing conditions, etc., ...).

Other than removing it manually and mowing infestations short and
removing the clippings and preventing it from going to seed as much as
possible (it's an annual so each year's crop is from seed left from
previous or earlier years, hence why the pre-emergents are effective if
down early enough so there there to stop the seedlings from surviving)
are about the only control techniques. As somebody else noted, as long
as there's a seed supply, you'll have a continuing problem.

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