Does UHD have a sustainability program for university operations?
UHD's community garden does still exist. The person on staff who originally established it is no longer with the University. However, the UH-Downtown Environmental Club, a student organization, maintains it. They have an active Facebook page at http://www.facebook.com/UHDenvironmentalclub?ref=ffa.
Also, you may want to contact the UHD's Assistant Vice President for Facilities Management.