Jiffy tomato & vegetable greenhouse contains 16 large peat pellets (60 millimeter size). Larger pellet allows for a stronger root system for larger plants, especially tomatoes. Features Superthrive plant vitamin packet for increased success and plant markers. Includes dome to maintain humidity and warmth during germination period. Number Of Cells: 16 Cells Size: 11 In. W. x 11 In. L.