 I've been mulching heavy with leaves this year, and so I've got more microbes using up my nitrogen than I'm used to getting because some of those leaves get mixed in as I plant. So I've actually had to go out and use it. Gosh darn it, I've had to use it by the book, by the recommendations, because of my situation. But most of the time, it's just simply not necessary. You don't need your plants to grow that lush, that green, and that vigorously.