Most of my established peonies are singles and semi-doubles, thought all doubles had to be staked until a few years ago! And I have several that haven't bloomed at all yet, hopefully not lost completely with last year's late blizzard. Went through my pics from last spring and the earliest doubles I found were Lady Alexandra Duff and Bess Bockstoce, June 9th and 11th. Latest last spring were Jacorma and Sonoma Halo, 7/11 and 7/15. LAD has been in place for years and has been completely reliable, even through our crazy weather. The other three were first year blooms so they don't have much of a record yet but so far, so good! The fact that they even produced stems and leaves that didn't shrivel away was better than a lot of the 1st year peonies from last spring......