You certainly can use it as water to grow plants. But better not drinking it, since it can host bacteria in the long run.
There is good stuff about it here: http://www.slate.com/articles/news_and_politics/explainer/2011/08/how_gross_is_the_water_that_drips_from_air_conditioners.html
It can also be linked here in the site: someone thought about filtering it before drinking - Can you drink condensation water from air-con after treating it?Can you drink condensation water from air-con after treating it?
But anyway, this water wouldn't have any minerals in it, so no good for drinking for the every-day.