Can I use Barricade 65 WDG Herbicide on native grasses in Colorado?
I would like to keep the pretty grasses, but eliminate the gnarly weeds such as thistle and other prickly boradleaf weeds
Answer:
Pre-emergents such as Barricade 65 WDG Herbicide are safe on most common established turfgrasses. If you have grass that is not specifically listed as tolerant on a product label, then we recommend testing a small area for tolerance before treating the entire area.
Keep in mind, also, that Prodiamine will not prevent thistles. You would need to use a product containing Isoxaben, such as Gallery 75 DF, for prevention of thistles and many other tougher broadleaf weeds.