I just gave away a dendrobium that did not like the cooler house temps in the winter. It would get such a slow start on the new growth it would never finish in time. I loved the den but....
I do think it is helpful to look up Angs. with the Angraecum Encyclopedia (an online site), then look up the temps and conditions in Madagascar from their particular region. Some angs come from the lowlands, some from the mountains, some live in deep shade, some are on rocks where they get quite a bit of light. The temps are quite different, too. Fred Hillman's (I think this is the guy) writings are wonderfully helpful, too.
I know that aerangis are recommended to be mounted but I had no luck trying to grow one mounted in a humid bowl. It died a slow, painful death (it was painful for me, too). When I see them for sale at two places in the Akron/Cleveland area, they are always potted. Hausermann's has them potted as well. My citrata and ellisii are both doing very well in the lava rock/net pots (new roots, new leaves). I also know that the angraecums and aerangis are very sensitive to fertilizer build-up.
Sorry you are so frustrated. I can well understand. They are so beautiful and to have so much trouble getting them to grow must be terrible. Then, to make matters worse, not that many people seem to grow and/or discuss them. It is difficult to pinpoint the best culture. I grow many plants and some are very picky so I am accustomed to adapting plants to grow in my environment. I also can put them outside for the summer and we have the perfect summers for orchids. Hope someone at you OS can help.
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