3 questions

[Roberta]

Originally Posted by Asca

Thank you everyone for your replies and the info.
One last question. Do humidity trays work to increase the humidity?

Not particularly... if the humidity is low and the plants are drying out quickly (which is good) just water more often. What the medium provides is surface area to hold water in the presence of air (humidity is the result). As long as there is air around the roots, you really can't over-water.

For a reference... if you can be patient, the American Orchid Society is coming out with a new book, a Guide to Orchids and Their Culture, authored by Mary Gerritsen and Ron Parsons. I have their book on orchid culture in the San Francisco Bay area and it's superbly written. Mary is very thorough, and Ron's photographs are wonderful. (I haven't see this new book yet since it hasn't been released, but I have read other references that they have co-authored and expect this one to also be an excellent source of information) Expected availability is a couple of months, watch the AOS website.