To my knowledge, no controlled experiments have ever justified the blurb
that comes with the
bottle.

One of the commercial growers in my orchid newsgroup did a controlled
experiment and found that it does work. Of course it is much too expensive in
small bottles. I buy it in pints or quarts, especially when I can get a
discount. Ignore the nonsense on the label. There is another similar product
called Roots2, which was tested by a university out West. However, Roots2 is
hard to find and stains everything it touches.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)