Humidi-Grow Trays 101 (13½" x 10½" x 2¼") by Waldor Orchids. $15.94. HT-101 H-2 1/4' x L-13 1/2' x W-10 1/2'. Makes great addition to any orchid collection. Bonsai or Orchid Humidity/Drip Tray. Waldor Orchids Over Our 75 Years In Business. The Humidi-Grow Tray allows you to use pots with drain holes without worrying about excess water pouring out and causing structural or furniture damage. The overflow will pass through this pot and collect in the tray where the settled w...