the source matters... myco apply is not the best....
Products were tested by Western Labs. The lab tests 50ml samples of product. To put the data into perspective Ron Wallance, a well known Giant Pumpkin grower, had his cover crop soil tested. His spore count was 600, showing that common Mycorrhizal products are lacking in potency. Although Western Labs has said that anything above 30 is considered 'good'.
The product from RTI that appears in these charts is Pumpkin Pro. We settled on the 3000 figure because our counts varied from as high as 10,000 and down to 1500.
mycorrhiza 101...