Updated on September 7, 2026. Ratings below are university lists, not a guarantee for your street. Confirm the current lists on the linked extension pages before you buy a crate of roots.
Rarely. Garden peonies are one of the few big-bloom perennials deer usually walk past. Minnesota Extension’s deer-resistant table includes Paeonia lactiflora. Iowa State, compiling Rutgers, Cornell, and Michigan State lists (last reviewed July 2022), files peony under perennials rarely damaged. University of Georgia Circular 985 puts Paeonia spp. with plants deer rarely browse. That is the opposite of hostas and tulips. It is not deer-proof. A starving April herd will still sample the red shoots.
| Verdict | Rarely eaten. Plant them. Do not call them deer-proof. |
|---|---|
| What they eat | Mostly the tender red spring shoots; blooms only under high pressure |
| Peak risk | Emergence, when fat reserves are lowest |
| What works | Plant peonies instead of hydrangeas; cage the first spring if the herd is dense |
| What does not | Using peonies as a “fence” around hostas; a 4-foot picket; “deer-proof cultivar” tags |
This is a garden-plant page, not a wild-diet page. Woods browse is on what deer eat. For the rest of the planting list, use the deer-proof garden guide.
Three peonies, one deer question
University lists rate the genus, not a named cultivar. North Dakota State University’s 2024 circular (H2245) is the culture sheet that matches what people buy.
- Herbaceous / garden peony (Paeonia lactiflora hybrids). The common 2- to 3-foot clump. Minnesota lists it at that height and notes it may need staking. It dies to the ground after frost and pushes new red shoots in spring — the only real browse window. This is the plant this page is about.
- Tree peony (P. suffruticosa and allies). Woody; it does not die to the ground. Penn State: plant a grafted tree peony with the graft union 4 to 6 inches below the soil, the opposite of an herbaceous crown. Mature wood is harder to eat. A young graft is still in the browse zone.
- Itoh / intersectional. NDSU: a garden × tree hybrid that still dies back each winter. ‘Bartzella’ is the yellow they flag for the Northern Plains. New wood every spring means the same window as a lactiflora.
What they eat, and when
The window is emergence, not the June show. Penn State Master Gardeners in Adams County describe the new shoots as quite red, almost like rhubarb. That tissue is tender, at nose height, and it appears when Minnesota Extension says spring damage rises because fat reserves are lowest. A deer has no upper incisors, so it grabs and tears. After a raid you get ragged stubs, not a clean 45-degree clip.
Once the foliage hardens into a 2- to 3-foot mound, most herds leave it. Ohio State’s Joe Boggs: garden peonies appear immune to four-legged pests; deer and rabbits don’t eat the foliage. That is Ohio, not a hungry New Jersey cul-de-sac. Cornell Cooperative Extension’s Westchester Master Gardener survey is the honest outlier — Paeonia sits with plants occasionally eaten, next to iris and sedum, not with hostas and tulips in the often-or-always column. Iowa State still files it as rarely damaged. Read that as pressure, not chemistry.
Blooms are usually ignored. Lose a flower and you lose that stem for the year. The crown and the eyes stay underground; deer do not excavate them the way they take a tulip. Raids track the dawn and dusk windows on when deer feed.
Deer vs rabbit vs Botrytis
Collapsed spring stems are often a fungus, not a deer. Penn State’s peony disease table: Botrytis blight makes young shoots discolor, wilt, and fall over; later you get browned buds and gray fuzzy spores. NDSU’s fix is sanitation — cut tops in late September or October and do not compost diseased foliage.
- Deer. Ragged, torn stubs. Browse from about a foot up to chest height. Hoof prints and pellet piles. Minnesota: deer damage looks rough or shredded, not cleanly clipped.
- Rabbit. A neat 45-degree cut near the soil or snow line. Hardware cloth at the soil line stops rabbits; a deer steps over it. If that is the pest, use how to keep rabbits from eating plants.
- Botrytis. Stems wilt and fall over while still attached. Gray mold on buds. Clean up; do not cage.
Ants on the buds are not a pest and they are not opening the flowers. NDSU: they are after the sticky material; no control is necessary. OSU: extrafloral nectar pays them to drive off bud-eating insects. Leave them.
Where it is worst
Worst yards are the high-density suburbs that built Cornell’s “occasionally eaten” rating — Westchester, northern New Jersey, parts of Pennsylvania and Maryland — where the herd is already on hostas, roses, and hydrangeas and will sample anything green in April. Upper Midwest and Northern Plains yards are why peonies have a reputation: NDSU grows them to the Canadian border, they bloom in June, and they live 50 years or more in fertile soil. UGA still lists peony as rarely browsed; classic lactifloras are still a Northern plant first.
UGA notes fertilized landscape plants are protein- and moisture-rich, and deer get about a third of their water from succulent tissue. An irrigated, freshly mulched bed in a dry April is a drink. That is the week to watch, not July.
If the flowers never come, it is probably you
This is the peony fact that does not belong on a hosta page. Penn State: cover the eyes of a bare-root herbaceous peony with only 1 to 2 inches of soil. Planted too deep, flowers will not emerge. NDSU: not more than 2 inches over the top bud; deeper plants make excellent foliage and fail to bloom. NDSU also wants 6 to 8 hours of sun and 3 to 4 feet between plants. A lush green clump with no June flowers is a depth or shade problem until you see torn stubs.
Fall is the planting window. NDSU: late August through early September for bare roots on the Northern Plains, with 3 to 5 healthy eyes per division. Divide only if you need more plants — divided clumps can take 2 to 3 years to bloom well again.
What actually works
Plant peonies and stop replacing hydrangeas. Species choice here actually changes the outcome, which it does not on a hosta.
- Full sun, near the house, not on the woodlot edge. NDSU: once mature they are best left undisturbed, so pick the spot once. A peony hoop is for flopping after rain, not for deer.
- Cage the first spring if Cornell-style pressure is your neighborhood — netting or a wire cylinder taller than the red shoots, until the foliage hardens. After that, most yards can drop the cage. Minnesota’s woven-wire standard for a whole bed is still at least 8 feet if you are also growing plants deer actually want. A 4-foot picket is a step. Deer clear that without thinking.
- Repellents only on the emergence window. Egg- or capsaicin-based sprays can cover those two weeks of red shoots. Reapply after rain. Which bottles last is on organic deer repellent. Whole-yard tactics live on how to keep deer out of garden beds.
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What does not work
Do not plant peonies as a scent barrier around hostas and expect the hostas to survive. Deer walk past the plants they dislike to reach the ones they prefer. Iowa State says nearly any plant on a “rarely damaged” list can still be browsed. UGA calls soap, human hair, and animal dung unreliable. Same bucket: dryer sheets, a 4-foot decorative fence, and a tag that claims ‘Sarah Bernhardt’ is more deer-proof than the genus. No university list rates cultivars separately. Cost comparisons of cages vs fences vs spraying: how to keep deer from eating plants. Do not feed the herd to “distract” them — what to feed backyard deer is the page that says don’t.
Plant these with them
If the point is a big spring bloom deer will leave alone, peonies are the honest swap for hydrangeas. Pair them with plants that share the sun and the rating:
- Daffodils — lycorine makes them one of the few bulbs deer skip. They take April before peonies open. See deer-resistant bulbs.
- Lavender — aromatic, full sun, on every serious rarely-eaten list. Do not jam it under the maple that is already shading your peony into a foliage-only clump.
- Salvia and geraniums — summer color after the peony show. Minnesota’s table includes both blue salvia and bedding geranium.
NDSU also pairs peonies with iris, catmint, and June-blooming alliums. Those live on deer-resistant perennials. Flowers they usually skip: what flowers deer do not eat.
Peonies survive next to plants that do not. Hostas go first in shade — and peonies want sun, so that pairing is a cultural mismatch as well as a buffet. If the hostas and tulips are already getting hit, your peony is on the route.
Common questions
Will peonies grow back after deer eat them?
Yes, if the crown and eyes are intact. Herbaceous peonies store next year’s stems on those eyes, 1 to 2 inches under the soil. Spring browse on red shoots can steal that year’s flowers the way a too-deep planting does. The plant usually returns. Repeated stripping of every new shoot weakens a young division. A 20-year clump is stubborn.
Are tree peonies or Itoh peonies more deer-proof?
No sourced university list splits the genus that way. Tree peonies are woody, so mature plants hold foliage above easy browse. Itoh types, per NDSU, still die to the ground and push new shoots every spring — same window as a garden peony.
Do ants mean the flowers need help opening?
No. NDSU and Ohio State both say ants are after nectar on the buds. They do not open the flowers and they do not signal a deer raid. Wash them off cut stems in the sink if you do not want them in the house.
Will a 4-foot fence save peonies?
You usually do not need a fence for the peonies. You need it for the hostas, roses, and tulips in the same yard. Eight feet is the number Minnesota uses for a real enclosure. A cage around first-year shoots works because the deer cannot get its head in, not because it cannot jump.
Are peonies poisonous to dogs and cats?
The ASPCA lists peony as toxic to dogs, cats, and horses. The principle is paeonol. Clinical signs: vomiting, diarrhea, depression. That is a chewing pet, not a reason deer skip the plant.
Sources
- University of Minnesota Extension — White-tailed deer damage (Paeonia lactiflora on the deer-resistant table; torn vs 45-degree cuts; 8-foot woven-wire fence)
- Iowa State Extension — Susceptibility of plants to deer damage (peony under perennials rarely damaged; Rutgers / Cornell / MSU; last reviewed July 2022)
- Rutgers Cooperative Extension — Landscape plants rated by deer resistance
- UGA Extension Circular 985 — Deer-tolerant ornamental plants
- Cornell Cooperative Extension Westchester — Paeonia listed as occasionally eaten
- NDSU Extension H2245 — Peonies: A North Dakota Favorite (October 2024)
- Ohio State University Extension BYGL — Peony clean-up
- Penn State Extension — Peony diseases
- ASPCA — Peony (paeonol; toxic to dogs, cats, horses)
Part of the Deer-Proof Garden Guide. Wild diet lives on what deer eat.
