[palmer]

I think that’s what I have here in Northern Virginia. Quite a mess, never fills in enough to be a real lawn, spreads everywhere, hard to kill.

[AlexW]

“I think that’s what I have here in Northern Virginia. Quite a mess, never fills in enough to be a real lawn, spreads everywhere, hard to kill.”
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Are you referring to Bermuda? I think N.VA is probably a bit far north for optimum growth.
Yes, the very narrow blades of Bermuda can be resistant to the
contact herbicides that act through the blade or leaf.