Thanks.
Also, interesting question/information, Arlene, Mike.
We have peonies, in our garden, blooming through most of June here.
Last year: from a few days into June to a few days before the end of June.
Re after blooming: I also do as Mike said.
Our perennials are generally pretty closely packed and cutting back and thinning out (to get sunlight through) seems an important consideration for us.
I do go easier on peonies though than I would on say garden phlox.
Am a bit confused: I'm noticing a colour change in our 'Duchesse de Nemours' (white, double).
It has had some pink/pinkish blooms over the last two years.
We've had it since 2012, when I really started adding peonies to our flower beds.
From recent reading on-line, I'm assuming our peony changing colour is not the result of the weather, but of volunteer seeding in our garden.
The confusing thing to me is that I have always deadhead all our peonies, after they bloomed (I'm a bit of a garden neat freak too!), so I would not have expected any seeding of hybrids.
See two of the pictures below.
Today: last of our irises blooming.
'Acapulco Gold'.
'Midnight Revelation'.
More peonies blooming.
'Felix Crousse'.
'Avalanche'.
Happening with our 'Duchesse de Nemours'.
(had it since 2012.)