When I began growing Vandas I found they hardly grow with the low amounts of fertilizer I use on other orchids. When I first read the amount recommended in the Motes book (1 Tablespoon/15ml of powder in a gallon / 3.8 liters) I was surprised, but it seemed to me reasonable to take the advice of somebody whose income comes from selling Vandas.
Since I began using the very large amounts recommended by Motes they began growing rapidly. I'm not the only person with this opinion here on Orchid Board:
http://www.orchidboard.com/community/962646-post14.html
Your summer temperatures with low humidity will be a challenge. You might need to water bare-root Vandas twice a day. You can raise the local humidity by growing other leafy plants nearby. Vandas can also be potted in very loose medium, which may decrease watering frequency.
Threaded Mode
