New York Foliage Weekly Report Posted on September 24, 2011September 24, 2011 by Jessica Fall for New York!. This website is helpful to know when to expect the color changes in leaves in New York. It’s updated every Wednesday. Share this:Click to email a link to a friend (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window) Related Posted in Observation.