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.
(..) Roommate? Oh, God, no. Did you know that having a hangover... ...is not having enough water in your body... ...to run your Krebs cycle? Which is exactly what happens to you when you're dying of thirst. So, dying of thirst... ...would probably feel... ...pretty much like the hangover (..)2001 A Beautiful Mind