Humidity trays serve a number of purposes. Stoneware bonsai pottery is extremely abrasive. Putting a tray under a bonsai pot
will protect the surface where the bonsai is kept. In addition, if you fill them with coarse gravel and put water in them they
release humidity into the air. This is great for both the bonsai, & the moss. Also, after watering a bonsai, it will
drip for quite a while. By placing the bonsai on a tray, it will have a place to drain without making a mess.
The trays are made of extra heavy-duty plastic. They are attractive and inexpensive.
All trays are just under 1 inch high except where noted.