In the lawn, most broad-leaf weed controls for lawns are effective at killing hawkweed without hurting the surrounding grass. Flame-weeders, boiling water and douses of vinegar are other options in non-lawn settings. … Unfortunately, there’s no one thing you can put down once to kill and stop hawkweed for good.

What kills yellow hawkweed?

Glyphosate (such as Roundup) is effective but is a non-selective herbicide that will also kill grasses in the area being sprayed. When using a non-selective herbicide, you must re-seed with desirable vegetation. Bare areas will re-infest from existing seed bank and any missed hawkweed plants.

Will vinegar kill unwanted plants?

Vinegar/soap weed killer is non-selective, which means that it will also damage/kill your desirable plants. So be careful when applying to weeds. … You also want to wait for a windless day so that your spray won’t inadvertently spray onto other plants. Your vinegar weed killer may or may not kill the root of the weed.