In a message dated 10/7/07 6:03:17 AM, Paul bouleau writes: > I have some of my orchids on humidity trays. > Humidity trays are a myth. The reason for having trays under your orchids is to catch the runoff when you water. They do get full of algae. It is unsightly but harmless. During the summer, when my orchids are outdoors, I soak all the trays in bleach. If the algae bother you, put a small amount of Physan in the tray periodically. Clorox fumes may harm delicate plants. Iris
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