I asked this before and got the answer that it's spaghnum peat moss. The spaghnum peat moss that I buy is fine stuff; I get it at Lowe's. Now when I was reading a thread describing how someone (I think it was Al) screens their peat with 1/2" screen (or was it 1/4"?), it makes no sense to me that peat would be the same thing as this peat moss that I buy. It would be pointless to screen it since it's fine material.