Quote:
Originally Posted by charlesf6
I still get very very confused about the different hydration needs of all of these plants. 
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You have to watch and understand plants over time to figure out watering. After enough experience, growers can walk into a room, and in less than a second notice, out of the corner of their eye, which plants in the room need water.
Any chance you can visit a greenhouse with a lot of orchids, and chat for several hours with the greenhousekeeper? It could be an orchid business, a botanical garden, a really good grower not to far away.... It would be worth the trouble to go.