The peonies bloom every year in the Peony Garden at the Nichols Arboretum in Ann Arbor. This year's prediction for the first bloom date is May 20-25, 2013, and for the peak season at about June 1, 2013; that according to the garden's Peony Bloom Countdown as of May 1. By midsummers night the blooming is over and the garden is all green.
More seasonal blooming information at the arb's spring, summer, fall, and winter pages.
UPDATE from the Peony Bloom Countdown:
Our current prediction was made on May 6:
Earliest bloom starting before May 25. Very early peonies as 'Red Charm' are already showing leaves while some of the very late peonies are only just showing buds breaking the surface.
Peak season to begin after Memorial Day Weekend.
Our current prediction as of May 14:
Earliest bloom starting before May 25. Very early peonies as 'Red Charm'are already showing leaves while some of the very late peonies are only just showing buds breaking the surface.
Peak season to begin after Memorial Day Weekend.
Edward Vielmetti's Wordpress weblog 