One box can hold up to 6 plants (24 plants in total). Includes one air pump that pumps air for all four cropboxes.8 watt air pump, pumps 158 gph. Dimensions: 13.75" 9.75" 5.5 / 2 gallons. Plant pot size (diameter): 2. Just add seed and water and place near the sunlight. Dimensions: 11.81 x 11.81 in. (30.0 x 30.0 cm). Includes a pair of metal bar hangers and rope hangers.