Husband has just got his back-pack spraying license which entitles us to buy systemics in bigger quantities (mostly because we have to keep weeds off 2000 baby vines). However, I can no longer control him - keep seeing new patches that are turning yellow including the edges of the lawn where he's tried to clear the brick edges the lazy way. The paths are looking fab though - I just have to make sure he doesn't go too far 'off piste'.