Pro-Mix HP Mycorrhizae (3.8 cf) is the high-porosity version — more perlite than BX for faster drainage and more air space around roots. HP is for plants that need excellent drainage and hate wet feet: succulents, herbs, and plants prone to root rot. Same professional-grade quality and mycorrhizae as BX, but with the drainage cranked up. Choose HP over BX when drainage is the priority. Available in Galion, OH.
