living in tropic, want to grow some orchids outside.
 

Hello,
I am from India,living in a zone where summer reaches 40C
(May-June) and heavy rain during July to Sept.Winter goes to as cold as 9C during January and on an average 12-14C at night in Jan-Feb.
Can you suggest me some orchids to raise on outside trees, specially those which do not suffer crown rot due to water logging?

I am currently raising phal,vanda, oncidium, catesetum, dendrobium all indoor, in balcony and windowsill.

How about some Cattleya's, just happen to love them myself. I would think the Vanda's would do well out side, some Oncidium or such.

I'm sorry, I didn't see your post before.

My summer temperatures are hotter than yours, to 45 almost every summer. I have frost almost every winter, so I can't keep many orchids outside. But your temperatures are a lot like my sunroom, where I grow my plants.

A lot of terrestrial orchids have monsoonal climates with dry winters like yours. Look for Bletilla, Calanthe, Eulophia, Habenaria, Phaius and hybrids.

Many of the Dendrobiums in the nobile group will do fine outside on trees for you. They also come from monsoonal climates. 40C is no problem for them. They normally hang down so water does not accumulate in the crowns.

Brassavolas will do well for you, including what was a B. but is now Rhyncholaelia digbyana. So will many of the Tolumnias.

Vandas with terete ancestry (Papilionandas) do well in humidity, rain, heat and sun. Also Renantanda and Renanopsis hybrids.

Try putting your Catasetums on the trees. The time to move them is in early spring, just as new roots are forming. It is probably too late this year. They do not mind huge amounts of water during the monsoon. They like to be mostly dry during the winter.

Some of the Australian Dendrobiums from the York Peninsula have a climate not too different from yours. Try Den. smilliae on the tree.

Do you have neighbors, especially older neighbors who garden a lot? May be worth driving around and seeing if anyone has any orchids growing outdoors already, or asking at a local nursery.

Have you looked into native species?