Hi-Yield (31134) Grass Killer Postemergence Grass Herbicide, 8 oz | Fluazifop-P-butyl selective herbicide - Post-emergent grass killer safe to use over ornamentals - Landscapers

These photos have been taken one week from application and I will wait until the third week to see if a second application is required . Some grass has browned, some has turned purple, and there is some completely green and unaffected but it has only been a week.

Good product for removing invasive grass species. For anyone who has had slow results or only seen their grass yellow but not die, suggest adding 1/2 of one percent Glyphosate to the mixture. The Glyphosate really turbo charges this product and is such a low percentage that non-grasses are not likely to be hurt. I sprayed Japanes Stiltgrass that had ferns mixed in and the grass died but the ferns were fine.

I have used this in the past and loved it. This time it has not killed one blade of grass. I don't know if it was old or improperly stored or what, but I just wasted my time and money. Applied it three different times to be sure. Soooo disappointed.

This herbicide is highly selective - only kills broad leafed grasses. I've been using it to eliminate Japanese Stiltgrass in some wooded property we own. NOTHING else is affected by it, not even the patch of ferns that we have repeatedly sprayed to kill the stiltgrass growing among them. I've heard people suggest a more "natural" weed killer like vinegar-based mixes, but that would kill EVERYTHING. Personally, I'm trying to save everything but the stiltgrass. I strongly recommend mixing with some kind of surfactant so that the herbicide will stick to the grass blades.

We have a problem with Bermuda grass in our flower beds. This product works well to control Bermuda grass. When I ordered it I did not realize that I would also need to have crop oil for this to work well. The crop oil helps the product to adhere to the grass. Without the oil the product just evaporates too quickly to be effective.

Products works to kill crabgrass with very little damage to Monkeygrass

Not what I was expecting

I purchased this because when seeing last autumn a bunch of seed ended up in my garden. An AI search result recommended this product. Upon receiving it the instructions made it appear like it was intended for weed type grasses as opposed to lawn grass (in this case, tall fescue). I tried it anyway. Within a few days all the fescue in the garden was dead and the vinca was fine!