Edit: Thanks to Bob for directing me here, cheers!

Hi folks,

For some reason this year, I've caught the gardening bug - which
has led to the complete demolition and rebuild of our garden. My
aches: severe, but it's all great fun.

That aside, I've hit a basic problem - How much grass seed to put
down? I cleared a small area just under our living room windows
and put a fair amount of seed down, yet it has grown patchy. At some
point I wish to do all of the garden, once I've levelled the ground.
Do you smother the mud? Apply sparingly? Any help appreciated!