Peonies - State by State Garden

Best Peonies for Ohio

Peonies are the plants that stand up each May with fat buds, then sag under the weight of their own flowers by June. Ohio suits them well, because the cold winter rest they need to flower is a given here. The question is which type and which flower form fit your yard.

Best Peonies to Grow in Ohio

Garden peonies, the herbaceous kind, are the dependable choice across Ohio, with intersectional and tree peonies as good partners. Ohio’s winters sit in USDA hardiness zones 5b to 6b, and peonies need a cold winter rest to flower, so they thrive here instead of struggling the way they do in mild climates.

Garden Peonies

The herbaceous peony is the one most people picture, and the standard form in most home gardens is Paeonia lactiflora. It dies back to the ground each fall and sends up new growth in spring, which makes the routine easy to learn.

It comes in a wide range of flower forms and colors, and it is long lived, with foliage that stays attractive well after the blooms fade.

Intersectional Peonies

Also called Itoh peonies, these are hybrids of the garden and tree peonies. They share the same culture as garden peonies: they die back each fall and return in spring, so the same care applies.

For an Ohio yard that already has garden peonies, an intersectional fits in without a new routine to learn.

Tree Peonies

Tree peonies are woody shrubs, not perennials that vanish each winter. They go dormant but renew growth each spring from woody stems, so you leave those stems standing instead of cutting them to the ground.

Mature plants do not usually need staking, because the woody branches hold up the heavy flowers.

Fernleaf Peony

Paeonia tenuifolia is noted for finely cut, fern-like foliage and crimson red flowers. It brings texture to a border before and after the blooms, which suits a front bed where the leaves get as much attention as the flowers.

Woodland Peonies

Paeonia japonica and Paeonia obovata are best suited for shade gardeners. If your yard has a shaded bed, these are the peonies to consider.

Flower Forms to Look For

Peonies are sorted by flower type, from singles with guard petals around pollen-bearing stamens to full doubles, where the stamens have turned into petals. Japanese and anemone types sit between, and semi-doubles fall in the middle.

Singles and Japanese forms carry less weight than full doubles, a useful thing to remember when you want fewer drooping stems. You can also mix early, mid-season and late cultivars to carry the display from May into June.

How to Choose a Peony for an Ohio Garden

Start with the space and the time you have, then match the type. Ohio’s cold winters are an advantage for peonies, so hardiness is rarely the limit. Shade, room and upkeep decide most choices.

Plant in September, or October at the latest, so roots settle in before winter. A new or transplanted peony may not bloom the first spring, so patience is part of every choice below.

Your situation	What suits it in Ohio	Why
Cold winter	Garden or intersectional peony	They need a cold rest to flower and die back to the ground each fall
Little time	Garden or intersectional peony	They are the easiest to grow, with the same yearly routine
Shady yard	Woodland peony	Paeonia japonica and Paeonia obovata suit shade gardeners
Heavy blooms that flop	Tree peony	Woody branches support large flowers without staking
Long bloom season	Early, mid-season and late cultivars	Together they extend the display from May into June

Textured foliage is the draw of the fernleaf peony, and for most homeowners the plain garden peony remains the simplest start.

Which Peonies Suit Different Parts of Ohio

Ohio’s zones run from 5b to 6b, and the spring frost window for the reference city, Columbus, falls from May 5 to May 15. Within that range, peony choice shifts only a little.

Northern Ohio, along Lake Erie: Garden peonies are a natural fit for Ohio’s cold winters. Tree peonies can go in too, with woody stems left uncut.
Central and southern Ohio: Winters are still cold enough for peonies to flower well. Any type works, and an early planting lets roots settle before winter.

Across all of Ohio, the shade of your yard shapes the choice more than the map does.

Peony Buying Mistakes to Avoid in Ohio

Planting Too Deep

A peony set too deep may bloom poorly or not come up at all, and that is a loss of whole seasons. Keep the eyes near the soil surface when you plant, and check the depth before you backfill.

Cutting Back the Wrong Peony

A herbaceous peony is cut back after frost in fall, in October or November, with early spring as the other window. A tree peony keeps its woody stems and is never cut back, so cutting one down removes next year’s growth.

Expecting Flowers Right Away

A newly planted or transplanted peony may not bloom the first spring. Many buyers assume a potted plant is faulty when it skips a season, then dig it up and set it back further. Leave it in place and give it time.

Ignoring Adult Size

A pot gives no hint of mature size. A tree peony develops into a woody shrub, so check its mature size before you place it near a walkway or under a window.

Where to Get Peony Advice in Ohio

For questions about varieties and your soil, Ohio gardeners have a local resource. Ohio State University Extension covers the state, and the county office can speak to your own yard.

The extension website offers guidance for Ohio gardens, worth a look before the September planting window.
Your county extension office can answer questions about which peony forms and sites suit your neighborhood.

Common Questions

When Do Peonies Bloom in Ohio?

Peonies flower from May into June in Ohio. Early, mid-season and late cultivars carry that show from May into June.

Do Peonies Need Staking?

Tree peonies usually do not once they are mature, because their woody branches carry the heavy flowers. Garden peonies with big double blooms may lean after rain, so singles and Japanese forms are lighter options.

Can You Plant Peonies in Spring in Ohio?

September, or October at the latest, is the planting window, so roots can establish before winter. A newly planted peony may skip its first spring bloom.

Best Peonies for Nova Scotia

Peony buds swell on the stem in late spring, then open into large, showy flowers in the early garden. Nova Scotia gives peonies the cold winters they need, so herbaceous, tree, intersectional and woodland types all have a place. Which one fits depends on how much care you want to give and what you want from the bloom.

Best Peonies to Grow in Nova Scotia

Peonies need a cold winter rest to flower, and they flower poorly where winters stay mild. Halifax sits in Canadian hardiness zone 6b, a rating built on several climate variables and not comparable to a USDA zone. Peonies generally need temperatures below 40°F. That cold period should last at least 6 weeks, which a Nova Scotia winter supplies.

Garden Peony

The garden or herbaceous peony (Paeonia hybrids) is the classic border plant. It dies back to the ground each year and returns from the roots in spring, which suits a province with a real winter.

Tree Peony

The tree peony, including Paeonia suffruticosa, is woody. Its stems stay standing through winter and carry the buds, so the shrub builds a framework year after year. It comes into bloom a little ahead of the garden types.

Intersectional Peony

Also called the Itoh, the intersectional peony is a hybrid of the garden and tree types. It is the last of the groups to bloom, which stretches the season well into June. Choose it if you want flowers after your garden peonies have faded.

Woodland Peony

The woodland peony (Paeonia japonica) carries white flowers and opens first in the sequence. Its show is brief, but it starts the peony season before any of the others.

How to Choose a Peony for a Nova Scotia Garden

Nova Scotia has no peony timing guide of its own, so the months here follow the nearest comparable climate. Confirm local timing with a garden centre, a garden society or the provincial gardening groups.

Planting or dividing is best in August and September, and it can also be done in October. Roots then settle before the ground freezes.

Your situation	What suits it in Nova Scotia	Why
Cold winters	Garden peony	It dies back each year and uses the winter cold to set flowers
Little time for care	Garden peony	It is cut back after frost and needs no woody pruning
You want a woody shrub	Tree peony	Its stems stay through winter and are never cut back
You want flowers for weeks	Woodland, tree, garden and intersectional peonies together	The types bloom one after another, from late spring into June

Spring planting is possible, though it may delay flowers by a year.

Which Peonies Suit Different Parts of Nova Scotia

Local conditions change across the province, so timing and exposure matter when you choose a peony.

Halifax: The last spring frost falls on average around May 7, but that date is only the middle of a window.
Cape Breton Highlands and other upland or northern districts: spring frost clears weeks later than in Halifax, so confirm local timing with a local garden centre, a garden society or the provincial or territorial gardening groups.

A local garden society can tell you how far your district runs behind the coast.

Peony Buying Mistakes to Avoid in Nova Scotia

Cutting a Tree Peony Down

A tree peony keeps its woody stems, and the buds for next spring sit on that old wood. Cut it to the ground and you remove the flowers with it. Treat only the herbaceous types as cut-to-the-ground plants.

Planting the Eyes Too Deep

A peony set too deep may bloom poorly or not come up at all. Keep the eyes near the soil surface when you plant or divide, and check the depth before you backfill.

Buying Without Knowing the Type

A potted peony can be a herbaceous plant that vanishes each fall or a tree peony that stays woody, and their care differs. Read the label for type and adult size before you choose a spot. A new plant may also skip flowers its first spring, so do not judge it too soon.

Where to Get Peony Advice in Nova Scotia

The Nova Scotia Department of Agriculture is the provincial starting point, and local growers fill in the district detail.

A garden centre can confirm type and adult size on the label, so ask before the planting window of August to September.
A garden society can tell you when peonies bloom in your own district, which varies from the coast to the uplands.
The provincial gardening groups can point you to growers who have kept peonies through local winters.

Common Questions

When Do Peonies Bloom in Nova Scotia?

Bloom runs from May into June, depending on the type. As a guide, the woodland peony opens first, followed by tree peonies. Herbaceous types follow, then the intersectional hybrids finish the season.

When Should You Cut Back Peonies in Nova Scotia?

Cut herbaceous peonies back in November or December, once the foliage has died back. They can also be cut back in March or April, so the timing is flexible.

Does a May 7 Last Frost Mean Peonies Are Safe After That Date?

No. That date is an average for Halifax, so in about half the years frost arrives later. Treat it as the middle of a window and keep a cover handy for new shoots, especially on upland ground.

Best Peonies for Northwest Territories

Peony buds push up red and tight each spring before the stems fill out. In the Northwest Territories, herbaceous peonies earn their place because long, hard winters give them the rest they need. Northern gardens reward a careful choice of peony type and cultivar.

Best Peonies to Grow in Northwest Territories

Herbaceous peonies die back to the ground each fall, and cultivars with a record in northern gardens are practical choices here. Peonies need a cold winter rest to flower, and the territory gives them plenty. The reference city of Yellowknife sits in Canadian hardiness zone 1b, which is not a USDA zone and does not convert to one.

Herbaceous Peonies

These are the backbone of a northern peony bed. The plant dies back every year and is cut back after frost, so nothing woody stands exposed to the winter wind. Buds rest underground, protected by soil and snow.

Plant them in a sunny spot where the crown can settle in before the ground freezes.

Late-Blooming Cultivars

In far-northern gardens, peonies bloom in July and August, later than elsewhere in North America. That timing is a gift: your flowers open when most peony gardens on the continent are finished.

When you shop, ask a local garden center which cultivars have been grown successfully in northern gardens. Those have already proven they can wake up and flower on a northern schedule.

Cultivars Proven in Northern Gardens

Peonies can flower through July in a northern climate. A cultivar with a northern growing record is a useful place to start. Favor named cultivars with a record of northern growing over anonymous bargain roots.

Peonies for a Cold Winter Rest

The territory is not too mild for peonies, which may flower poorly in mild-winter climates. Peonies need a cold winter rest to flower, so cold winters here suit them. Rely on that cold rest, and cut herbaceous peonies back after frost.

How to Choose a Peony for a Northwest Territories Garden

Your choice comes down to a few questions: how cold your yard gets, when you want flowers, and how patient you can be. In Yellowknife, the average last spring frost is May 25, which is only a midpoint. In one year out of two, frost falls later than that date.

Gardens farther north run behind it, so let your own spring guide you.

Your situation	What suits it in Northwest Territories	Why
Very cold winter	Herbaceous peonies	They die back each year and are cut back after frost, so no woody stems face the winter
Want flowers when others have finished	Herbaceous cultivars with a northern growing record	Far-northern peonies bloom in July and August, later than elsewhere in North America
Worried about enough cold	A herbaceous cultivar with a northern growing record	Peonies need a cold winter rest to flower, and Yellowknife’s Canadian zone 1b winters supply it
Late spring frost risk	Plants that bloom in midsummer	A late-season bloom stays clear of spring frost, which may fall after May 25 in half of years in Yellowknife
Planting a new bed	Bare roots set out in September	Roots settle in before the ground freezes

Bloom can also come in June for some plants, though July and August are the usual months. Because the territory has no local extension page on peony timing, these dates follow the nearest comparable climate, so confirm local timing with a garden center, a garden society or a territorial gardening group.

Which Peonies Suit Different Parts of Northwest Territories

The territory is huge, and the garden season changes a good deal from the Great Slave Lake area to the Arctic coast. Timing changes across the territory, so local experience matters.

Yellowknife: Herbaceous peonies of northern cultivars suit it, planted in September.
Inuvik and the Mackenzie Delta: Spring comes later and winter sets in sooner, so the season for roots to settle is shorter. Plant herbaceous peonies in September, while the soil is still workable and before it freezes.

Wherever you garden, a sheltered spot out of the wind helps the early shoots.

Peony Buying Mistakes to Avoid in Northwest Territories

Tender Types

A tree peony keeps its woody stems through winter and is never cut back. In Yellowknife’s Canadian zone 1b climate, those exposed stems may be vulnerable. The exposed stems can suffer winter damage.

Choose herbaceous peonies instead, which cut back to the ground after frost and rest safely below the snow.

Mild-Climate Varieties

Peonies may flower poorly where the cold winter rest is missing. Here you have the opposite problem, so the risk is a plant bred for another climate that has not been grown through a northern spring.

Ask where a cultivar has been grown, and favor ones with a northern record.

Pots with Unknown Adult Size

A small potted peony may need more room in the garden than its nursery pot suggests. Planted too close to a path or a foundation, it must be dug and divided later, and a newly moved peony may not bloom the first spring afterward.

Read the tag, then leave generous room around each plant when you set it out.

Where to Get Peony Advice in Northwest Territories

Local advice comes from the territorial government, garden groups and nearby nurseries.

The Northwest Territories Industry, Tourism and Investment agriculture services are the place to start for territorial growing questions, ideally in winter when you are planning.
A local garden society or master gardener group can tell you which cultivars have survived in your own neighborhood, so ask before ordering roots.
A garden centre can confirm which peonies it expects to have for planting in September, so call in late summer.

Common Questions

How Deep Should You Plant a Peony in the Northwest Territories?

Keep the eyes near the soil surface. A peony planted too deep may bloom poorly or not come up at all, so check the crown if a healthy plant stays leafy and flowerless.

Do You Cut Peonies Back in Fall?

A herbaceous peony is cut back after frost, once the foliage has died down. A tree peony keeps its woody stems and is never cut back to the ground.

Why Did a New Peony Not Bloom?

A newly planted or transplanted peony may not bloom the first spring, so patience is part of the job. If an established plant stays flowerless, check the planting depth and how much sun it gets.

Best Peonies for North Dakota

An established peony that comes back loaded with buds after a brutal prairie winter is a dependable plant for a North Dakota yard. Herbaceous garden peonies and intersectional (Itoh) peonies fit the state’s cold well, while tree peonies need more protection.

Best Peonies to Grow in North Dakota

Herbaceous garden peonies and intersectional peonies are easy choices here because these plants die back to the ground each fall and send up fresh growth in spring. Peonies also need a cold winter rest to flower, and North Dakota supplies it, with USDA hardiness zones running from 3a to 4b across the state. Tree peonies can work, but only with help.

Herbaceous Garden Peony

The herbaceous garden peony descends from the Chinese peony (Paeonia lactiflora) and the common peony (P. officinalis). Hundreds of cultivars came from those two species, so there is plenty to choose from.

Each fall the plant dies back to the ground, leaving the crown near the soil surface through the cold. Cut it back after frost has killed the foliage.

Intersectional Peony

Also called the Itoh, this is a hybrid of the garden peony and the tree peony. It has the same culture as the herbaceous type, dying back each fall and returning in spring, which makes it among the easiest to grow.

If you want something a little different from the classic garden peony without taking on a woody shrub, this is the one to look at.

Tree Peony

Tree peonies, mostly derived from P. suffruticosa, are generally not as hardy as the other types. In a cold state like this one, plant them in a protected site or mulch them over the winter.

A tree peony keeps its woody stems, so it is never cut back to the ground the way an herbaceous peony is. Treat it as a gamble worth taking only where you can offer shelter.

Choosing a Disease-Resistant Cultivar

Varieties differ somewhat in disease susceptibility. The variety ‘Avalanche’ is reportedly especially susceptible to Phytophthora, so ask a nursery about a cultivar’s track record before you buy.

Phytophthora rarely develops in light, sandy soils, which is a useful point if your yard drains fast.

How to Choose a Peony for a North Dakota Garden

Your own yard helps narrow the choice before you open a catalog. Think about how cold the winter gets where you live, how much time you want to spend, and how much room the plant will have once it matures.

Because peonies need a cold winter rest to bloom, a North Dakota winter is an advantage rather than a worry for the hardy types.

Your situation	What suits it in North Dakota	Why
Very cold winter	Herbaceous garden peony	It dies back to the ground each fall and regrows in spring, and the cold rest helps it flower.
Little time to spend	Herbaceous or intersectional peony	Herbaceous and intersectional peonies are among the easiest to grow and share the same simple yearly routine.
Damp, humid summer	A cultivar known to resist disease, in light sandy soil if you have it	Varieties differ in disease susceptibility, and Phytophthora rarely develops in light, sandy soils.
Exposed, windy site	Herbaceous peony rather than tree peony	Tree peonies are less hardy and need a protected site or winter mulch.
Want something different	Intersectional (Itoh) peony	It blends garden and tree peony parentage yet grows like the herbaceous type.

Tree peonies belong on the list only if you have a sheltered corner and are willing to mulch them. Whatever you pick, a newly planted or transplanted peony may not bloom the first spring, so give it time.

Which Peonies Suit Different Parts of North Dakota

The state spans a range of winter cold, so choose a peony type that suits the conditions in your yard.

Northern North Dakota: Herbaceous and intersectional peonies are easy to grow because they die back fully each fall. Tree peonies need a protected site or winter mulch.
Southern North Dakota: Intersectional peonies are easy to grow, while tree peonies still need a protected site or winter mulch.
Red River Valley: Ask a local nursery about disease susceptibility before choosing a cultivar.

Check your own county’s conditions before choosing, since local microclimates shift from yard to yard.

Peony Buying Mistakes to Avoid in North Dakota

Choosing a Tree Peony Without Shelter

Tree peonies are generally not as hardy as other types, so an unprotected one can suffer through a North Dakota winter. Cold damage can set back a woody plant that took time to establish.

Plant it in a protected site and mulch it over winter, or choose an herbaceous or intersectional peony instead.