I only have a couple of these, a smaller growing species, and a bigger hybrid. The species grows like a weed for me -likes a pretty fair amount of light and water. The hybrid does less well for me, but stays alive ... I really think I shouldn't leave the hybrid outside in winter
*Note to self: Bring hybrid Epi inside this fall* Probably intermediate or warm to hot temps are best ... I'm sure others can advise more specifically about the temps
But lots of light, and shouldn't get too dry.
I'm not sure about all Epidendrums, but don't cut spikes off until they are completely dead, some at least (my little species is one) will get new buds from a previously bloomed spike.