Just posted on the other myco thread, but since I just joined my posts need approval. I can tell you for a fact though (I have talked with the Mycorrhizal Applications Rep) that AN sources their myco products from them). So save yourself some money and order it from the source. Plus, you won't be supporting a company that has done terrible things for the cannabis movement and consistently overprices their products to the consumer.
You also don't want trichoderma in your myco mix, as it can inhibit initial mycorrhizal colonization/infection.
Checkout
www.mycorrhizae.com (Dr. Mike's company in Grant's Pass).
My grow recommendation would be to apply the myco to your seedlings (early in the plant's life cycle). You only need to apply it 1X, but it needs to be directly to the roots of the plant. There are a few micronized products, but I still recommend a direct root application. Not worth putting it through your entire soil mix or using as a soil drench. No need to reapply it either, it's a waste of money.
I'd use a well-made aerated compost tea to get the beneficial microbes (bacteria/archea, fungi, protozoa), rather than buying a commercial mix. You'll get exponentially more microbes, they'll be active rather than dormant, you'll have a working consortium of nutrient cycling which is a better mimicry of nature, and overall better plant health. Not to mention it way more cost-effective.
Not sure if I'm allowed to post links, but I can give sources for more information or support of everything I've written above.
~CT Guy
