New to using this product. I was told to wait approx. 2 weeks after the first frost before using this product to ensure I do not hurt the desirable turf grasses. It does not say anything about waiting for dormancy on the label (Princep). Bermuda and Buffalo wuold be treated in this case and we are in the transition zone. My question is, if the warm season grasses have gone dormant won't the majority of the grassy weeds we are attempting to eliminate also be dormant?