Backyard birds are one of the best indicators that springtime has arrived. Birds are extremely sensitive to weather. Bluebirds, for instance, are good harbingers. As the old poem goes: “Bluebirds are a sign of spring and gentle south breezes they bring.”
The USDA tells us that the “average” date of the last frost here is around February 27. It also reports that we are “almost” assured that we will receive no frost between March 20 and November 1, making the frost-free growing season around 270 days.