David Grays Winter Grass Killer 125g

Winter grass takes over a lawn fast and seeds everywhere before you've had a chance to deal with it. David Grays Winter Grass Killer stops it both ways, knocking out the plants that are already up and stopping new seed from getting going.

It's selective, so it controls winter grass in couch and buffalo lawns without harming the turf. The active ingredient is propyzamide at 100g per kilo. It stays active in the soil for up to eight weeks to catch seed as it germinates, and clears established winter grass within a few weeks.

Mix the powder with water and apply across the lawn, then water it in. A 125g pack covers more than 200 square metres. Keep it off ryegrass, fescue and bent lawns.

Mixing rates and the lawns it suits are in the tabs below.