Hudson Valley Flower Festival Returns to Kelder's Farm in KerhonksonThis is one of my favorite parts of summertime, not only because fall is in the future, but because the sunflowers are in bloom. The Hudson Valley Flower Festival returns at Kelder's Farm in Kerhonkson, New York, where you can pick your own sunflowers, wildflowers, veggies and berries. The Hudson Valley Flower Festival is running now through September 7th at Kelder's Farm. We spoke with John Kelder when we visited during the Hudson Valley Flower Festival and he tells us that they're working on a new 150-foot slide for the kids! And you can't leave Kelder's Farm without getting a seasonal Gnomie Shake!