Sobennikoffia robusta and Dendrobium senile, anyone?

[Silje]

Hello guys!

I bought a few new orchids last week and have come to realize I've got no clue how to treat a couple of them.

Does anybody here grow Sobennikoffia robusta, by any chance? Beforehand I knew that it's an angraecoid from Madagascar, and from searching online it looks like it prefers drier conditions than many of the others, but other than that... I'd appreciate whatever info and advice I can get.

The other one is a Dendrobium senile. Always wanted one. I think they look super-cute, but now that it's actually in the greenhouse, in a tiny net pot, I've realized I've got no idea whether this one prefers to be wet or dry, in shade or sun, mounted or potted. I've seen it likes a dry winter rest...other than that...