I am looking to add some beneficial fungi to the soil of some trees that were (of course) planted in miserable soil. I'm inheriting this problem, and want to fix it. I was pondering deep root feeding them (mostly maples, 2"-5" trunks) with some home brew compost tea and adding a micro rhizae (spelling?) supplement to the mix. What is a good brand? I am familiar with Roots products, but wasn't sure if any of you folks new a good brand.