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This is a discussion on Dendrobium amethystoglossa within the Cattleyas, Vandas, Dendrobiums IN BLOOM forums, part of the Orchid Photography category; Hi Geoff, Congratulations on getting it to bloom. I also struggled with this species for ...
Hi Geoff, Congratulations on getting it to bloom.
I also struggled with this species for several years and finally gave up on it. According to the literature it's an intermediate-cool growing species that likes very high humidity and good light. I think the main problem is precisely that it needs the high humidity to grow and be happy, and also that it probably doesn't experience any kind of rest period in its native habitat. This becomes a problem under my conditions as I can't keep the humidity as high in winter as in summer. Most of my plants need a very strict winter rest with low temperatures and humidity. They would rot in record time if the humidity were too high during their rest, especially at night time when the temps can drop to 10 degrees C. The lack of sunlight in winter up here in Yorkshire is probably another factor that doesn't help with this species. My Den. amethystoglossum survived these conditions for several years, but it didn't grow at all for the last 2 years and it never bloomed, so eventually I decided to part with it.
It obviously likes the conditions you're giving it right now, so try to maintain them all-year round if you can.