So, what do they do (horticulturally) in the most urban setting in the world?

Earlier this month, I flew to NYC to join Jeff for a long weekend in the city and celebrate another trip around the sun. As is usually the case when I go to New York, I get Friday to myself to explore and wander the city. This year I decided to take a good close look at what New Yorkers do with their urban landscape in the summer - what color they are using, etc. NYC had a very cold, wet spring, and most of the summer color had just been planted that week; I did see a couple beds where the planting was just being finished. For the most part I thought the work they did was nice - nothing spectacular, but pleasant enough and (very importantly) they used plant materials that can stand up to