GrazonNext HL controls more than 100 annual, biennial and perennial broadleaf weeds. It is especially tough on hard-to-kill perennials, including nightshades, Canada thistle, horsenettle and Texas bullnettle, while providing sharper burndown of many other broadleaf weeds, such as biennial thistles, cocklebur, dandelion, annual broomweed, curly dock, ironweed and ragweeds.