Plastic Bonsai Humidity Tray 9x12 with pebbles. Bonsai Humidity Trays are used to protect surfaces and maintain moisture levels around Bonsai between waterings.
Layer pebbles on the tray and then place your Bonsai. As you water your Bonsai, the excess water will drain from the holes in the bottom of the Bonsai container onto the tray. Keep some water in the tray at all times to provide a humid environment for your Bonsai.