I use complete fertilizers, either 7-9-5 Dyna Gro or 13-3-15 MSU-type, mixed to about 150ppm N on all my orchids. The only difference in procedure between different orchid types is the frequency with I which I fertilize them. Masdevallias get fed once every 7 days or so (like Alfonso, every second watering).
Sometimes I intentionally skip a week of fertilizing them in order to "flush" the roots out well, but I doubt it has much effect or is necessary. Just an old habit.
Last edited by markr; 09-05-2008 at 07:02 PM..
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