Eric from Royersford writes
SpeedZone Lawn Weed Killer Concentrate is a post-emergent that will only kill actively growing weeds and not the seeds, unfortunately, it is not labeled to help control hairy bittercress. Instead, you can use Ferti-lome Weed-Out Lawn Weed Killer with Trimec which is labeled to help control actively growing hairy bittercress. Please review the product label for complete application instructions. Next fall, you can use Gallery 75 DF Specialty Herbicide as a pre-emergent to control hairy bittercress.
Answer last updated on: 03/27/2022
