If you are growing your Gardenia as a potted plant indoors, keep it out of direct, hot sun, and allow it to only get bright light. I think that your 'black mold' is more than likely an algae growth, which is a cosmetic problem for your plant rather than a health problem.
Monona is a city in Dane County, Wisconsin, United States. The population was 7,533 at the 2010 census. It is completely surrounded by Madison and is part of the Madison Metropolitan Statistical Area.
Ginna Nuclear Power Plant is located on 426 acres along the south shores of Lake Ontario in Ontario, NY, about 20 miles northeast of Rochester. Ginna is a Westinghouse, two-loop, pressurized water reactor (PWR) with an output of approximately 580 megawatts â enough electricity to power 500,000 homes.