New improved Tuffgrass has a proven ability to create dog patch resistant lawns and be tough enough to stand up to the wear and tear of family use. Johnsons Lawn Seed Tuffgrass 200sqm/4.25kg Tuffgrass with Dog Patch Resistance is a unique product that has been formulated to banish the problem of yellow patches and dead areas of grass caused by dogs urinating on lawns By incorporating naturally tolerant grass species, scorched patches in lawns will be consigned to history, without consumers having to change their dog's diet or behaviour Even if slight discolouration occasionally occur, grass will recover