I like the scientific explantion, Ray.

This might explain my first experiences last year with the phals. I bought some MSU fertilizer and the instructions said feed weakly weekly. I didn't know at the time that the dosage recommended was weak, at least that's what they told me. I was using about 1/4 strength in order for it to be weak.

From what you are saying the recommended dosage is not weak but the P level at the recommended dosage is only 3 or 4%. If I fed weakly (1/4 dosage) then it was reduced to practically nothing. However, the phals bloomed great for me which is how I ended up getting addicted to orchids. Maybe I will try the K-lite since the K level is pretty high. Sheesh. The accessories for the orchids cost more than the orchid itself.