There are several tree peonies that do rebloom in the fall but that depends on your growing area and the season. You might want to start looking at the variations of the foliage both on regular and tree peonies. Most intersectional all have similar follage so they do not add to the landscape other than an yellowish green blob after blooming.

In addition to planting various other perennials (and annual plants) around them to extend the season of color within the same border smaller growing kinds of dahlias can be planted between the clumps of peony plants themselves.

I agree with the planting other things for color but dahlias here quickly fade and seldom rebloom, if alive, later in the season. Would depend on what does well in OP's area.

and deer don't browse peonies

I don't know where you are, but there's one thing I hate about peonies...powdery mildew. In my area, no matter what variety I see they look good spring + early summer with nice foliage and flowers , then they go downhill and by late august they are covered in mildew here which looks really bad even from a distance. And it's kind of pointless to treat since it always happens year after year and they'll be cut to ground in a month or 2

Then they get cut to the ground and the bed looks so empty in winter...basically they look good for only about 3/4 months.

I think with care roses look a bit better throughout the entire year, and in winter its not just an empty spot that was cut at ground level as with peonies

You could try adding peonies that bloom early, mid and late. This would extend the bloom cycle. I also grow roses and find that Kordes roses are disease resistant, hardy and beautiful. They don't have a fragrance. JBs don't bother them as much. Good luck!

I second everything Karen said - I grow a lot of roses in addition to peonies, and roses are a full-time job (on top of my full-time job!), whereas my peonies are essentially maintenance free. I have several David Austin roses and I find them to be every bit as high maintenance as all my other roses. If you want roses, prepare to spend a LOT of your time pruning, watering, feeding, picking off Japanese beetles and sawfly larvae, repelling thrips and deer, treating things like powdery mildew and blackspot (even more of a challenge if you're like me and don't use chemicals), dealing with defoliation and heat/cold stress or dieback, watching for rose rosette disease, etc., etc., etc. They're beautiful, but a TON of work to keep healthy...and in the winter you have dead-looking canes sticking up everywhere since you don't prune until spring. The one exception has been knockouts (healthy and low maintenance for roses, but kind of "meh" on the wow factor) and my Drift roses, which have smaller blooms and act as more of a spreading low-growing shrub. My Drifts are very healthy, rebloom throughout the spring and summer, and I do almost nothing for them other than watering and picking off the Japanese beetles, and spraying deer repellent on them.

I know you posted this a few months ago but I wanted to share my feelings on roses. I have actually been digging up almost all of my roses except for my old moss roses (which are once blooming except for one) and a couple of DAs I can't part with (Constance Spry, Judge the Obscure, and a few others). I am selling them locally to fund my peony obsession and am branching out from herbaceous and adding itohs and trees this year which should increase my bloom season.

Unless you have a lot of time and patience, I find roses really frustrating. I live in Iowa zone 5, and I get a lot of winter die back with my DAs, with many dying back to the ground, then in late May the sawfly larvae comes by and defoliates my roses and they look terrible and messy. I don't use pesticides in my garden since I grow flowers for bees and butterflies and I love birds and don't want them to eat poisoned bugs.

So the roses look terrible, and the roses are super short and put out a ton of effort growing so many buds on a tiny plant, which I cut off to try and get them to focus on new cane growth. Which they do, and then they have had time to grow and rebloom in the late supper/early fall, it's right in time for the Japanese Beetles to come ruin the flowers.

In addition to peonies I grow hostas for lots of color variety (my garden is shady enough for hostas and sunny enough for peonies), and lots of clematis which have different types that bloom at different times during the summer.

Obviously this is just my two cents but I wanted to share my experience from someone who used to love roses in case you are worried about any of those issues.

I've been on a hiatus on the rose acquisition as the DA tree roses were not available for 2018. It was hinted it may not be for 2019. Love peonies just like I love tulips, too bad they bloom and fade in a blink of a eye. Now if there was blossoms through summer, that's a different story ;-)

Best thing is to get a small refrigerator. You can cut the peonies when they are still in partially closed buds but soft as a marshmallow stage. Immediately put them in buckets with water added with flower food. Pull off the foliage to leave only about 2-3 leaves on the stems. After about 2 hours in this solution, you can put them in clean plastic bags (grocery shopping bags) Put them in the fridge. Every week after the peony bloom season is done, you can take them out and enjoy them as cut flowers. They should last at least a month. Depending on the fridge temps, they can last up to two months.

prettypeonies something to mark your calendar with the American Peony Society meeting will be in Ames, Iowa starting for members May 14, 2019 with the open to the public show May 18 and 19.

Hey maifleur that is amazing I have it on my calendar :)