I went back through my pics from 2015 for what was blooming at the same time as Cytherea. That's a hard one because of the very distinct color--reds and medium to dark pink wouldn't look nice beside it (although it hasn't always stopped me!) Here's what was blooming at the same time that I think would look good with it, mostly pale pinks to white and a lot of the "cactus flower" types of peonies--Vanilla Raspberry Swirl, Pink Spinners, Pink Charmer, Pink Firefly, Miss America, Mother's Choice, Gilbert H Wild, Dakota Princess, Dinner Plate, Duchess de Orleans and Duchess de Nemours. These are all quite different bloom types and colors but should be complementary. My Cytherea is in full sun now, Pink Firefly and Mother's Choice are in some shade so might bloom a bit earlier if they were in the same bed but all of the others are in the same lighting conditions. Blue flowers would look really nice with Cytherea as well, lots of people do blue iris and or false indigo as well as clematis. Ooh, just noticed there's a pic of a pink peony with a purplish lupin showing in the thumbnail beside this post; if they bloomed at the same time a white lupin would be very pretty and dramatic...Shasta daisies with their completely different bloom type and foliage would be gorgeous! I like Rocky Mountain Penstemon, it blooms for several weeks and self seeds so you only need to start with a few plants. It is easy to keep tidy too--very short, ground cover-like foliage after the bloom stem is removed. I think Cytherea blooms after my mock orange has finished but those blooms are gorgeous in a peony arrangement....

Make sure you share what you decide to put with it and we'd love to see pictures!

Thanks so much!!! I am going to sit down and look at all of these great options online... And yes, I will follow up with my decisions. Also, I thought I had a photo of it when it bloomed last spring, but apparently not... I can't find any. It's a beauty though. Thanks again Liz, I mostly hang out in the hosta forum...the number and beauty and variety of cultivars of both of these fantastic garden plants is wonderful, but also mind-boggling.

You're very welcome! Another thing you might want to look at is this Peony Bloom Time Project http://peonybloomdate.com/index.htm  Just look at Cytherea's bloom week and find others that bloom at the same time. They do vary from year to year, depending on local conditions, but it's a good guide. You're right about mind boggling! I have several with no names in my garden, trying to figure out what they are has been pretty much impossible!

That's a good resource!

I thought so! I'm still trying to map bloom times for several NOIDs to see if I can narrow down contenders. Might be tougher than I initially thought--I've ordered from Gilbert Wild for years and they don't always send the correct root....prices are great and always healthy, don't think I've ever lost a root from them, but their lack of accuracy means I can't even narrow it down even though I have all of my purchase records since moving to this house!