Great White is not a really a fertilizer. It is a fungus that helps the root zone with the uptake of nutrients. I am not knowledgeable about autos or your growing style but if your doing a soil grow then yes, it would probably be beneficial. The thing about Myccorrhizae is that it only needs to be used once (per transplant) so that 4oz jar would last a very long time if it lasted, which it won't. I believe it is comprised of living spores that eventually expire with age.