I have raised orchids for 3 years now. I live in a tropical climate and just attach orchids to my frangipani. they do well although it rains 300 days a year. Was raining 3 days this week. I use a highly draining media (crushed volcanic rock, chopped coconut husk, charcoal) I have to move them under the eaves when rains the entire week, which is often, but overall they're fine when you leave them alone. Dendrobiums are hardy and grow well here