I've been using the MSU fertilizer for 2 years and have definitely noticed a difference in the rate of growth, both vegetative and spike induction. I've been using it on some of my tropical house plants (anthuriums, bromeliads etc.) and they all seem to respond to it. Here's an interesting article about it:
http://www.msu.edu/%7Egoddengr/publi...blications.htm