On Jul 31, 9:10*pm, songbird wrote:
Billy wrote:
*songbird wrote:

* i wonder if they have a graywater recycling system
from the building plumbing available?

It sounds like they shunt all the gray water to one line that can be
switched to the garden, or the sewer.

Was that the question?

* yes, water being scarce out there i can't
imagine it being feasible to keep a large
rooftop garden off the regular water supply.

* songbird

I would say try hydroponics but it was invented more than a thousand
years ago and saves too much water!