A new business opened in Denver that "said" they carried Premier Pro-Mix BX. Well, I made the drive up to Denver (about 80 miles round trip) only to discover they sold Premier Pro-Mix HP not BX. The HP stands for "High Porosity". I reviewed the ingredients and honestly couldn't see any difference between the two formulas. In theory, the HP formula should work very well with African Violets and other plants that prefer a porous growing medium.
Curiosity got the better of me so I cracked the bale and sifted some of it to see its construction. I immediately noticed the HP formula has a lot more perlite (hence the High Porosity description) than the BX formula. Other than perhaps reducing the amount of perlite I add to the mix, I don't see that I'll have to make any other adjustments.
The cost was $42 which I thought was a bit high for a 3.8 cubic feet compressed bag. I was paying $34 in California. Fluffed out, it makes 7 cubic feet of potting mix which will fill about 2,000 3 ounce solo cups. I figure when I add a little extra perlite my "recipe" costs me about .03 cents a pot.
I've been using Premier's products for close to 20 years and I honestly wouldn't use anything else. If you're not using Premier Pro-Mix for your violets, you might consider doing so. Pro-Mix is available in smaller quantities so don't feel the need to buy a 3.8 cubic foot bale!
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