crab grass takeover of prairie plot
Last Winter, I planted grasses/prairie mix (~60/40)over snow-covered bare soil; grasses = Schizachyrium scoparium, Bouteloua curtipendula (from Stock Seed Farm). I prepped last fall by spraying w/ glyphosate and raking 2X.
This summer, the plot is overrun w/ crabgrass. There are forbs, but no indication of LBS or SOG. I have mowed over the top twice. Do I kill off and start over or what? Please advise.