Not sure about mid 20s but at least some, such as
Epi Gordons Pink, have survived down to 28 at Santa Barbara Orchid Estate. If you haven't already tried it outdoors then it would be a pretty good candidate.
Some reeds can be small enough to bring inside though. Here's a photo that I shared in
my recent thread...
If you have trouble seeing the photo then
try this link to the album.
Left: Epidendrum Red Mini x self
Right: Epidendrum Little Miss Sunshine (Epi magnoliae 'SVO' x Epi xanthinum f. compactum 'Resplendens' CBR/AOS)
I recently purchased both of these orchids from
Sunset Valley Orchids. I'm sure that they'll get a little larger but they shouldn't get so large that it's a hassle to bring them indoors.
As for breeding, some reed-stem Epis can be a little challenging to pollinate. But after that hurdle the seeds can be easily germinated. Unlike most other orchid seeds you don't have to worry about flasking. The reed-stem seeds can be sown on moist Sphagnum moss in zip lock bags near a bright window.