Angela,
Can't remember where it was posted on ST or who posted it, but someone commented that the best fertilizer formula to use on plants potted in Orchiata was urea based, not nitrate based. Not an issue for us since we went back to a fir bark based mix years ago and use urea based fertilizers exclusively, but your mix/fert combo may be a factor in your fischeri seedlings growth rate.
Can't remember where it was posted on ST or who posted it, but someone commented that the best fertilizer formula to use on plants potted in Orchiata was urea based, not nitrate based. Not an issue for us since we went back to a fir bark based mix years ago and use urea based fertilizers exclusively, but your mix/fert combo may be a factor in your fischeri seedlings growth rate.