There are a lot of sources for Michigan State University fertilizer formulations in the US. I bought mine online from First Ray's. Ray Barkalow runs this business and has also been posting to this thread. He is the source of the information site mentioned in my second post, above.
I have noticed Ray has mentioned in other posts that, for his own plants, he has switched from using an MSU formulation to the KLite product he sells. I haven't looked at that yet because I still have MSU formulation to use.
Ray also sells a seaweed product called KelpMax, which I use. It is a root formation stimulant and not a fertilizer. I definitely noticed a great increase in root formation when I started using it monthly on Vanda seedlings, whose roots are out in the air and easy to see.
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