What Planting Zone is Pittsburgh, PA?According to the USDA Pittsburgh, PA is Plant Hardiness Zone 6, so the average last frost date in spring is around May 15, and first frost date in fall is around October 15.
According to the USDA Pittsburgh, PA is Plant Hardiness Zone 6, so the average last frost date in spring is around May 15, and first frost date in fall is around October 15.