Yeah, the mixture sounds 20% good. Don't use the MG shit, and your up to 70% good. Horse manure has to be cured/ not green. If it's old, 20% would be cool, if shit can be cool. Gil., the Master Gardeners has found out within the last 6 months that peat moss is "anti-microbial". I bought the high dollar long cut, Mossers Peat Moss last season. I will not use it anymore. For water retention, etc, drag your hand through a warm farm. That soil will get your flag heading north, for sure. Good, live soil will do better than peat, anyway. See concept420.com I wish I had found that 2 years ago.