OK, Since nobody replied (WAH) I will post my own.

I sprayed ornamec 170 last weekend on my wildflower garden, afraid everthing would croak, not just the quackgrass.

As of day 6, all the wildflowers (and weeds) are doing OK.

The quackgrasss is SLOWLY turning yellow, and hasn't continued to grow. Maybe this stuff isn't so bad.

I'm guessing I will need to re-apply again.

well...its been over 15 days...whats the results?

ive used poast with limited success. prolly because im scared to use it in my grassy prairies and put it on way to thin. i have just purchased a backpack sprayer devoted to poast and will give some results when i get the courage to blast away.

froggy

I've used grass killers with Ornamec's active component (fluazifop) with good success. It's especially helpful to knock out annual grasses in March in plots where my annual wildflowers (Indian blanket, clasping coneflower, etc) are just getting started. Like Roundup, it takes a while, but eventually kills the grasses. Unfortunately, my worst grass pest, tall fescue, seems tolerant of it, so for that bad boy I have to do a winter application of Roundup.