you definitely can. If plants are bigger and you have to water bigger amounts, just have to be patient^..... and there is a "toparea ( no holes in the upper two rows) in the pots. So if you put them together look that the area with no holes in the first 2 rows is up. Iam using a Plate under the pots too.. . Airpots are just great . nearly impossible to overwater. But dont let your soil get tooo dry . then its more difficult. But if you water patiently every 3-4 days everything is fine....... I put the plants once in the week into my Shower, and give them a nice and slow saturating shower. After shower let them stand for 2 hours, and back to growroom. This way you ensure, the medium is always nicely saturated. Iam tending to water them daily/ every other day. because its easier to handle.