Recently I found at a Home Depot a ProMix variety called ProMix Ultimate. I cannot locate this item on the ProMix company's website -
http://www.promixfindgrowtopia.com/ It seems to be mostly peat with some perlite. It was billed on package as being great for starting seedlings. Came in a 2 cu ft bale, says it expands to 4 cu ft.
I have tried using it this year (mixed with 1/2 to 1/3 perlite for improved drainage, hopefully) when putting my rooted cuttings into 32 oz cups, seems to be working ok so far, may hold a little more water than I would like. Anyone else with experience with this stuff?
I think it may be the same as this item, although the packaging looks different:
http://www.homedepot.com/p/Premier-PRO-MIX-2-cu-ft-All-Purpose-Growing-Mix-Compressed-0105/202314037I will try to get a pic of the package when I get home, and post it here.