What is the rate for Weed'n'Feed granular per sq metre?

It is best to apply Weed n Feed Granular to your lawn prior to sowing any seed. This product will clean up the weeds and fertilise the existing lawn. The weeds will die and the empty spaces that will remain could benefit from oversowing. If you sow your seed then apply the granules there is every chance those seeds may get burnt in the "weed n feed" process. A 12.5kg bag will cover an area of 187.5 m2.