Brunnings Feed 'N Weed feeds lawns while selectively killing broadleaf weeds including clover, dandelion, dock, thistles, capeweed, bindii and lambs tongue. Feeds lawns. Selectively kills broadleaf weeds. Absorbed by the leaf and moves through the weed, through to the roots. Works by forcing the weed into an excessive and disordered growth pattern which results in weeds yellowing, curling and dying. Weeds are killed slowly over a period of 3 - 4 weeks. For best results apply when weeds are actively growing.