no, this is not seed i have sown, this is wild growing grasses such as you see in any wild area like the woods or near a lake or stream. in my opinion, this is the most powerful grass available as long as it isn't sprayed iwth pesticides. this is grass hybridized and tested by mother nature. i have juiced about 5 or 6 varieties of natural wild growing grasses over the last few years, and they have all been great to juice and drink. no one thinks of it, but the wild grasses are just as good as the stuff you cultivate, if not better.
all grasses concentrate a high amount of minerals, and have plenty of chlorophyl. those are the two keys to why they are healthy. as long as a grass has those two qualities it will be healthy for you.
no, i have not used clay too much. what benefits have you gained from it?