What's the back of that bale read? The front says Master's Mix so must have more than just the peat. My HP has a list of ingredients so yours may as well.
Canadian Sphagnum peat moss (65-75%)
Perlite - horticultural grade
Dolomitic and Calcitic limestone (pH adjuster)
Wetting agent
Mycorrhizae - endomycorrizal fungi (Glomus intraradices)
The more I look at that list the more I figure I could make my own version of HP for about half the price. Hmmmm . . .
I used to work at the peat bogs in Ft. Langley, BC. Floating around on a barge manning the spray hose to wash the peat through a grate after the clam digger dumped a load on it then it was pumped to the plant a mile away for screening, pressing and drying in a huge rotary dryer that sounded like a 747 taking off with a giant gas flame blasting through it. We got high and a bit f'n drunk and sank that damn barge one night. The owner's son did it with the digger so nobody got fired. lol