Why can't you buy "St Augustine" grass seed?

Question

I can buy all the other types of grass seeds at Home Depot, etc.., but it seems like no easily accessable store sells the St augustine style. Is it so I have to buy those half-dead square pieces of sod to throw in my yard?

Answer 1

I have never seen St. Augustine grass have seed heads.  It grows from sprigs that are cut from the 'half-dead square pieces'.