Tantrika wrote: What is your favorite source? I found bio-organics.... ------- I have had good experience with bio-organics' product. No hype, no b.s., a wholly reputable seller who consistently gets good marks from skilled professional growers and researchers. There are a lot of charlatans selling mycorrhizal products and making off-the-wall claims. Chapman at bio-organics has not shown any sign of being one of the charlatans. Catharine - no affiliation, just a satisfied customer.