It’s mid-April and the weather forecast calls for temperatures in the 30s at night. Harold McMahon Plumbing sends out a form every “spring” asking clients when they’d like their outside water turned on. The form warns against turning it on before April 15. But the cheery flats of pansies are out at Wittendale’s, so spring must be drawing nigh. Right? This is zone 7a and 7b, after all.