In general how long does it take for a Chinese tree peony and herbaceous peony to have its first blossom?

Usually a Chinese tree peony bloom at its third or forth year. Some varieties take longer to bloom. This means if you bought a 3-year-old bare root Chinese tree peony, planted in the fall, it can bloom for you the next spring. Afterwards each year the flowers become better and bigger. Chinese peony can live more than a hundred year, so even a five year old plant is still a very young plant. A 2-year-old plant of herbaceous peony will bloom on the next spring. But this is not always the case, and flowers can be immature in size and shape.