These plants have a 2-year 'growth cycle'. [=the plants live and die within two years]
The water is 'cycled' back into/through the system after it has been used.
We have to wait for the dishwasher's wash and dry 'cycles' to end.
(..) - Got it. - And there's of them. Once you have activated lock, there should quitting immediately. If the hatch is opened when the CPU starts next cycle you are gonna get sucked into space. What happens when the hatch isn't opened? You are gonna get sucked into big fan. (..)2016 Star Trek Beyond