I just looked up Master Gardener because I'd never heard the term. Unfortunetly the course doesn't exist on Long Island, NY
I did go to a college that taught horticulture and botany but it only allowed certain GPA to take them which I didn't quite manage so I wasn't able to take the courses. They have their own greenhouse and botanical gardens. Farmingdale college in Farmingdale, NY very well known and close to my location.
