i was wondering if anyone uses hay as mulch in their vegetable garden?
will
it increase the weed problem if it has gone to seed?


Hay is a field crop(wheat, rye oats etc)that has been harvested whole--thus it
will containm seed heads.

Straw is the remaining part of a fields crop after the seed heads have been
harvested and thus will contain few if any seeds

Salt hay is a salt marsh plant from the east coast and does not have any seeds
and is less liable to break down.