Gravity-0 from In writes
Lawn has quickly developing quack grass. Does Tenacity works post emergence for this weed? I must try something immediately.
Tenacity Herbicide is not labeled for quackgrass as a pre or post emergent. Unfortunately, we do not currently carry any products that are labeled for quackgrass that are safe for use in cool season grass. We would recommend spot treating with something like Roundup QuikPRO and then reseeding any bare spots after 2 weeks. View our Quackgrass Treatment Guide for more information.
Answer last updated on: 09/20/2022