What Is A Pebble Tray

Almost every houseplant loves humidity and would benefit from a pebble tray. Some common names include Bromeliads, Orchids, Ferns, Zebra plant, English Ivy, and many more.

How much humidity does a pebble tray add?

This change in humidity above a pebble tray was tested by an orchid enthusiast. He found that in winter (see top meme), the humidity at 1.5″ above a pebble tray was 3% higher than the rest of the room. At 4″ this dropped to 2% and at 1 foot above the tray there was no increase in humidity.

Can you use any rocks for a pebble tray?

Decorative pebbles (polished river rocks, bonsai gravel, or glass gems all work well) A humidity-loving potted houseplant.