I added a mycorrhizae supplement (PHC plant saver and bio-pak), plus an organic fert with beneficial fungi (PHC healthy start) to my personal vegetable garden. My question is this: Assuming the myco has established itself (applied according to label rates 2 consecutive years), how long will it last? Will rototilling kill it or harm it? For anyone who has not tried it, the PHC stuff is AWESOME. The 3-4-3 Healthy Start is the best fertilizer I have ever used. I have some pretty poor soil where my garden is, and it does extremely well with that and the Plant saver. I use the 3-4-3 on everything in my yard, even house plants.