Rick
Well-Known Member
One thing that everyone except Xavier seems to ignore are the micronutrients.
Xavier (Roth) has repeatedly written that the Fe:Mn:Zn balance normally is more or less opposite to the chemistry of wild-grown leaves. You may find more on that in Xaviers thread on "Mineral Nutrition".
The reason why I mention this is that I noticed a growth spurt on my randsii seedlings once I sprayed with Dithane which is basically a manganese-zinc compound. Suddenly they started growing at the speed of normal paphs!
I haven't totally ignored the micros Bjorn, and this may get everybody all inflamed again, but K is antagonistic to Zn (probably just about all cations besides Ca and Mg).
So after taking the K out of the equation, I've been waiting for the last few years to see if other issues maybe related to micros will pop up. Not for me yet though.