PRO-MIX HP BIOSTIMULANT + MYCORRHIZAE GROW BAG is a ready-to-use, pre-filled bag with all the benefits of the PRO-MIX’s trusted HP formulation. This highly porous blend of sphagnum peat moss and perlite delivers exceptional drainage and aeration, making it ideal for cannabis plants with roots that thrive in oxygen-rich environments. It’s enriched with a biostimulant that promotes nutrient uptake and enhances plant resilience, as well as endomycorrhizae, which is beneficial for more extensive root systems and stronger plant health. The grow bag design is perfect for home growers, small-batch producers, or anyone interested in a clean, low-prep substrate for high-yield cannabis cultivation. If you’re looking for strong microbial support without the biostimulant, PRO-MIX HP MYCORRHIZAE is a solid choice. For improved structure and porosity in a similar format, check out PRO-MIX HPCC MYCORRHIZAE.