Okay, I figure commercial grass seed might be laced with pesticides and fertilizers and what all. But if you let your grass go to seed, and gathered and threshed it and boiled it up – would it be nutritious for humans?
After all, we eat a ton of ‘grass’ seeds – wheat, rye, barley, triticale, rice, corn, etc. Why not the seeds of lawn type grass?
I was thinking that after the zombie apocalypse we might be able to reap our lawns. 
I think that the other grains have been bred for large size, flavor, and starch content, as well as other traits that make them better for eating and growing.
Your lawn grass grains would probably be edible, though.
Interesting username/question combo.
Yeah, seeds of grasses are edible. The question is whether they provide enough nutrition to make gathering them worthwhile, and for most grasses the answer is no.
Ah. You mean in the sense that you’d expend more calories getting the seeds than you’d get from the seed?
Dang.
TANSTAAFL continues to rule.