Resolva Xtra Weed Killer Concentrate 250ml is a non-glyphosate, powerful systemic herbicide ideal for tackling troublesome, deep-rooted and broad-leaf weeds such as bracken, broad-leaved dock, common nettle and thistle, buttercup, dandelions and much more. Its selective concentrated formula has maximum coverage and kills weeds, as well as their roots, but does not damage lawns or grasses.