New York’s historic 28th Street flower market opens early. The sidewalk is a rush of colour by 5am, packed with cheerful yellow sunflowers, frothy lime-white hydrangeas and vibrant lilies. Office workers pick their way to work round tropical plants and tall leafy palms sway in the city breeze. Cathy FitzGerald hears the market’s stories, and finds out what it takes to make it in this very beautiful - and very tough - business.