Best Peonies for New Brunswick

Those fat round buds on peony stems in late spring are a sign of a plant that has had its winter, and New Brunswick gives it a proper one. Herbaceous, tree and intersectional peonies all have a place in a New Brunswick yard, and the woodland peony fits shadier corners. What changes the choice is bloom season, upkeep and how much room you can spare.

Best Peonies to Grow in New Brunswick

Garden peonies, tree peonies, intersectional (Itoh) peonies and the woodland peony are the main types to consider, and all need a cold winter rest to flower. The reference city of Moncton sits in Canadian hardiness zone 5a, which is a Canadian rating and does not convert to a USDA zone.

Garden Peony

The garden or herbaceous peony (Paeonia hybrids) is the familiar one, and it fits well into a New Brunswick routine. It flowers in late spring into June and then dies back on its own each year.

Cut the foliage to the ground after it has died back. Plant it with the eyes close to the soil surface, since a peony set too deep may bloom poorly or not come up at all.

Tree Peony

The woody tree peony (including Paeonia suffruticosa) keeps its stems through winter, so it builds a permanent framework instead of vanishing each fall. Its cold requirement is met here like that of any other peony.

Leave the woody stems standing. Only trim out wood that is clearly dead, and never cut the plant back to the ground the way you would a garden peony.

Intersectional Peony

The intersectional peony, also called the Itoh, is a cross between the garden and tree peonies. It flowers in late spring into June, and in a mixed planting it tends to come after the garden types.

It suits a yard where you want a peony that combines traits of garden and tree types, and it needs the same winter cold and shallow planting as the others.

Woodland Peony

The woodland peony (Paeonia japonica) is the white-flowered type, and it opens first in a mixed planting, in late spring. It is the one to look at for a shadier bed.

Like the others, it relies on winter cold to flower, so New Brunswick winters work in its favor.

How to Choose a Peony for a New Brunswick Garden

Start with what you want from the plant: a long season of flowers, a low-fuss shrub, or a classic border perennial. Most of the decision comes down to bloom order and how much cutting back you want to do.

Planting and dividing are best in August and September, and October works as a fallback. Spring planting is possible, but it may delay flowers a year.

For this province the planting and cutting months follow the nearest comparable climate, so confirm local timing with a garden centre, a garden society or the provincial gardening groups. A gardener with less time can also wait on a garden peony until early spring, in March or April, instead of cutting it back in November or December.

Which Peonies Suit Different Parts of New Brunswick

The province is not one climate, and the main difference for peonies is how late spring arrives.

• Moncton and the southeast: At Moncton, the last spring frost averages May 23, but in one year out of two it comes later, so treat that date as the middle of a window. Wait for the frost risk to ease before judging how a young plant has fared.
• Northern New Brunswick: Districts in the north and uplands run behind the southeast, so spring growth and bloom arrive later. Plant at the start of the August to September window so roots settle before winter.

Across the province, local conditions affect both timing and which peony will thrive in a particular yard.

Peony Buying Mistakes to Avoid in New Brunswick

Planting Too Deep

A peony buried too far down may bloom poorly or not come up. Many a healthy root can sulk in the ground because the soil was piled over it.

Set the eyes near the soil surface when you plant or divide, and check the depth again after the soil settles.

Cutting a Tree Peony to the Ground

A tree peony keeps woody stems that carry next year’s flowers, so a fall cleanup meant for garden peonies can cost it its structure. The herbaceous types are the ones cut back after frost.

Check the label before you pick up the shears, and remove only dead wood from a tree peony.

Planting Outside the Fall Window

A peony put in during late summer or early fall has time to settle before winter, while one planted in spring may delay flowers a year. August and September are the months to aim for, with October as a fallback.

If a spring purchase is unavoidable, plant it as soon as the soil can be worked and be patient about the first blooms.

Where to Get Peony Advice in New Brunswick

Local help comes from a few different places. General federal resources provide background, while local gardeners know the conditions in their area.

• Agriculture and Agri-Food Canada [link: https://agriculture.canada.ca/en] has broader federal resources for growers, and a visit before you plan a bed is worthwhile.
• A local garden centre can tell you what has done well nearby, so stop in during late summer before the fall planting window opens.
• A garden society or local master gardener group can confirm timing in your district, and a call before you dig is the next step.

Common Questions

When Do Peonies Bloom in New Brunswick?

Peonies bloom from May into June, depending on the type. The woodland peony tends to open first, with the garden and intersectional types following in a mixed planting.

When Should You Cut Back Peonies in New Brunswick?

Cut back garden peonies after the foliage has died back, in November or December. You can also wait until March or April and do it in early spring.

Will a New Peony Bloom the First Spring?

A newly planted or transplanted peony may not bloom the first spring. The plant spends that season settling its roots, and flowers usually follow once it has established.

Sources : rhs.org.uk