HI
you might invest in a timmer and a soker hose.you could set the timer to run say for 20 min in a 24 hour period.this might be your best bet to keep them moist while your gone.check and see how wet it gets in 20 min.you might have to addjust the time for the right amount of water.so you dont over water or not get enough water they would do better if you planted them out doors.if there in a
greenhouse make sure that you have lots of ventalation so as not to cook them. your friend in gardening.mike57