Howdy, This season I tested Mycorhizza in my Tomato patch. Planted 50 varieties and applied Mycorhizza per instructions to random plants (treated 75 plants). Have about 250 plants in garden, used compost with a little manure over entire garden, didn't use Triple 14 Osmocote like I generally do for fear it would be detrimental to Mycorhizza treated plants. To date, all plants are smaller than normal for this time of year, expect that is due to abnormal weather conditions. Mycorhizza treated plants show no differences in size or number of fruit set. The season has a long way to go, will be anxious to see if treated plants have a better over-all yield. Per claims for rapid growth, increased yields, etc. etc.-havn't seen it yet. Doubt if I will ever buy or use this product again. Good luck, Tom, North-Eastern CA