If you already have the SS amendments why are you even buying any sort of bagged soil at all?
ProMix is little more than peat and perlite and a few lightly added amendments, which you probably already have with the SS ingredients.
PM is what?, ~$32 for a 3.8cf bale? I get a 3.8cf bale of Premier peat moss for ~$12 and a 4cf bag of perlite for ~$18.
For about the same $$$$ I get close to double the amount of base mix. I just do my own mixing instead of paying Premier to do it.
Wet
ProMix is little more than peat and perlite and a few lightly added amendments, which you probably already have with the SS ingredients.
PM is what?, ~$32 for a 3.8cf bale? I get a 3.8cf bale of Premier peat moss for ~$12 and a 4cf bag of perlite for ~$18.
For about the same $$$$ I get close to double the amount of base mix. I just do my own mixing instead of paying Premier to do it.
Wet