I am not certain how long it blooms but it is very early around the time of 'Early Scout'. I may have some older dated pics. I frequently cover the eyes or pips of the early risers with sand or very sandy soil if the weather is forecasted to be extra cold. We are looking for lows slightly below freezing for a week or so with one night of 9°F. I am planning to cover them for awhile. The sand or very sandy soil brushes away with a regular paintbrush so the eyes are not damaged. Once I covered some peonies during cold nights and moisture gathered on the leaves and froze into ice. Learned to leave them alone and let them fend for themselves.