All of these bloom early. New growth develops from buds, or eyes, on the tuber. A single tuber may have many eyes, but it must have at least three to thrive. Plants grown from tubers with less than three eyes may take 3 to 5 years to produce more than a few small blooms. But, peonies grown from tubers with three to five eyes may flower well the second year after planting.
Peonies develop a taproot and many short, thin roots.
The taproot is a straight, thick, central root that extends farther into the soil than other roots. Often, it grows 12 to 1 inches deep. You can buy hybrid tree peonies. They produce larger flowers than regular tree peonies. Both hybrid and regular tree peonies have a serious fault.