Peony cut back


Time Your Pruning to Help Next Year's Blooms

After the first spring bulbs appear, the blooms I look forward to with the most anticipation in the spring are peonies. I love when I finally spot those big flower buds getting ready to burst open and reveal all the frilly petals they’ve been holding in. Knowing when to cut back peonies will ensure those beautiful blooms reappear next spring. Luckily once the flowers die back, you’re left with nice, strong foliage that will provide a backdrop for subsequent blooms.

Peony season, which can be anywhere from April to June, depending on where you live, can be fleeting. Those blooms that bring such colour and personality to the spring garden sure don’t like to hang around for long. But when shopping for peonies at the garden center, you can find early-, mid-, and late-season bloom times. Check the plant tag for details. I have a few peonies and luckily they don’t all open at once. They are staggered about a week or so apart, so I get to enjoy peony flowers for longer.

Peonies are a beautiful addition to a spring garden. Knowing when to cut back peonies—both the flowers and the foliage—will help to maintain a healthy plant (and encourage those blooms!) for the following season.

When to deadhead peonies

Hopefully you get to enjoy the flowers before a spring storm makes a mess of them. I’m often picking up sad-looking, bruised petals after a storm, lamenting the fact that the flowers seem to have just opened. Rain can make quick work of them, turning the petals into a bit of a mushy mess. If you find your peonies flop from their weight (or from a heavy rainfall), try placing a peony hoop over the plant, early in the spring, while it’s still easy to do so.

If your peony blooms don’t make it inside for cut flower arrangements, you can deadhead the faded flowers once they’re past their prime. This step, unfortunately, doesn’t encourage more flowers, like on other annuals and perennials.

It’s also worth noting that allowing the seed heads to form on spent blooms will affect next year’s growth. Deadheading right after the plant blooms allows it to redirect all of its energy into next year’s growth and blooms.

If you don’t snip all your peony flowers for vases, deadheading will help to redirect the energy into the plant for next year’s foliage and flowers, instead of forming seed pods.

To deadhead a peony, use a sharp, clean pair of pruners to snip the flower stems where they meet the leaves. As for the foliage, you’ll want to leave it standing in the garden well into autumn. The rest of this article will explain why you should leave your herbaceous peony foliage until fall.

When to cut back peonies

Throughout the season, your peony leaves may start to look less than stellar. And though it could be tempting to cut them back, the plant relies on the energy from the leaves for the following year’s new growth. That’s why you need to wait until fall to prune them back. Cutting them back sooner could affect next year’s flowers.

Peony foliage is susceptible to fungal diseases, like powdery mildew (shown here). It won’t kill your peony, but it doesn’t look great. This plant was placed in an area that gets part shade. Full sun and lots of air circulation around the plant will help it to thrive—and look better throughout the growing season.

For example, peony foliage can be prone to powdery mildew, which won’t kill the plant, it just looks unsightly. Full sun and lots of space to promote air circulation can help to prevent powdery mildew. Other afflictions can include botrytis blight, verticillium wilt, and Japanese beetles.

Knowing when to cut back peonies in fall is key. Timing-wise, wait until a hard frost has finished off the foliage. (Where I live, that’s usually around October, but some years it’s November.) Until that point, peony leaves are quite lovely in early fall, changing color—usually to a golden hue—like other trees and shrubs.

Using a sharp pair of pruning shears, prune back all the stems right to ground level. Be gentle with the soil around the base of the plant. You want to be careful not to damage the crown at the soil level.

Even when peonies have flopped over, the foliage is still attractive in the garden. Consider plant supports to prevent peonies from falling under their weight or in a heavy rain storm.

Why it’s important to cut back peony plants

On this site, we talk about the reasons why gardeners should save the fall garden cleanup until spring. Peonies, however, are exempt from this rule. They’re one of those plants you should cut back, especially if you have had disease issues throughout the growing season. Cutting back a peony will help to prevent pests and diseases from harming the plant. Be sure that once you’ve pruned everything back, you remove all the plant debris from the area, including any leaves that may have fallen. Discard the trimmings—diseased leaves or insect-ravaged stems—right into the garbage, not the compost pile.

If you live in an especially cold climate, add a light layer of mulch (such as shredded bark or pine needles) at the base of the plant where you cut everything back. Be sure to remove your winter mulch in the spring. If you’re amending the soil around your peony with compost—plants prefer well-draining soil—don’t pile it on the crown, add it around the perimeter.

Pests and diseases, like botrytis (shown here), may be unsightly, but it’s important to leave the peony foliage intact until fall so that the plant can develop its leaves and flowers for the following season.

When to cut back Itoh and tree peonies

Itoh (or intersectional) peonies, which are a cross between the herbaceous peonies mentioned in this article and tree peonies, should follow the same pruning schedule. However in this case, prune the herbaceous part down to the woody party, which you should leave intact.

The best time to prune a tree peony is right after it blooms. Do not cut it back in the fall as you would an herbaceous or Itoh peony. You can do a light pruning in the spring before the shrub blooms. Use clean pruners to remove suckers around the base, as well as any dead wood.

To see how peonies should be cut back and hear about different timing options, check out this video:

More pruning advice

When to Cut Back Peonies

When it comes to caring for garden peonies, one of the most frequently asked questions is how to prevent the tall perennial plants with their large, heavy flowerheads from flopping over. However, cutting back peonies is just as important for proper peony care. 

Here's why, when, and how to cut back and deadhead your peonies to get the most out of these garden favorites. 

Is Cutting Back Peonies Necessary?

In addition to the aesthetic considerations, the main reason for cutting back peonies is plant health. Peony diseases can be controlled by removing diseased foliage during the growing season, and by cutting back the entire plants after the end of the growing season in the fall.  

The Spruce / Colleen & Shannon Graham

Deadheading Peonies

Cutting back peonies is different from deadheading, which is the removal of the spent flowers after the bloom. If the flowers stay on the plants, they will produce seeds instead of storing all the plant energy in the roots, which ensures plant health and next year’s bloom. It does not matter how much you trim the flower stalks. However, for a neater appearance, it is best to cut them below the foliage so they don’t stick out.

Deadheading also extends the bloom time of Itoh peonies, which bloom later than garden peonies, but are deadheaded the same way. 

The Spruce / Colleen & Shannon Graham

Removing Flower Buds

Newly planted peonies benefit from removing the flower buds entirely before they open in the first spring. Not every gardener eager to see the peonies bloom is willing to make that sacrifice. But preventing the peonies from blooming in the first year after planting helps the plants get established, and the reward is a fuller bloom in the subsequent years.  

The Spruce / Colleen & Shannon Graham

Removing Peony Foliage

Cutting back peonies during the growing season is optional; it should be done as needed to prevent the spread of disease. Cutting back peonies in the fall, on the other hand, is always required. 

The Spruce / Colleen & Shannon Graham

Pruning for Disease Control

Two common fungal diseases of peonies are peony leaf blotch and powdery mildew. The spores of both fungi survive in dead leaves and infected plant debris through the winter. Good sanitation, which consists of cutting back infected plant parts during the growing season and disposing of the plant material in the trash, helps to control the spread of disease. 

Peony leaf blotch is caused by the fungus Cladosporium paeoniae. Because of the typical glossy purple or brown spots or blotches on the upper surface of the leaves, it is befittingly also called measles or red spot. As the season progresses, older, bigger leaves may also become distorted, and the stems show reddish-brown streaks.  

The other fungal disease affecting peonies is powdery mildew. Unless it is severe, the chalky residue on the leaves from powdery mildew is more of an eyesore than a disease that affects the plant. Still, to keep it under control, cut off infected leaves and collect any infected leaves that have dropped to the ground to prevent reinfection. 

When pruning out diseased leaves, have a bucket filled with one part chlorine bleach and nine parts water on stand by to disinfect your pruners. Dip them in the mix and wipe them dry with a clean rag, so you don’t spread the fungal spores from plant to plant. 

Lack of good air circulation in combination with moisture buildup can also worsen the spread of fungal disease in peonies. If the foliage of your peonies is healthy but very dense, it’s a good idea to thin the foliage a little to let more air and sunlight in. 

Powdery mildew on peonies

SBSArtDept / Getty Images

Fall Cleanup

In the fall, cut the peonies back but wait until the foliage has died or fully yellowed after a hard frost. If you cut the peonies back too early, you reduce the time during which the foliage is absorbing sunlight to build the plant’s energy reserves. This will result in reduced bloom the next year. 

Tip

Unlike garden peonies, tree peonies, which are woody perennials, require very little pruning other than deadheading and pruning of any dead branches.

How to Cut Back Peonies

1.   Cut off the stems at or near ground level after a hard frost.

2.  Thoroughly remove all plant debris and dead foliage regardless of whether the peonies have been infected with a disease or not. The dead foliage might contain fungal spores that are not visible to the human eye. If the plants were diseased, safely depose of them in the trash; do not compost it under any circumstances.

What to do with peonies after flowering - pruning and maintenance

Peonies - plants are quite unpretentious. They grow on almost any soil, easily tolerate transplantation, and bloom beautifully. However, in order for the flowering to be plentiful, the plants need a little help. Moreover, care for peonies should begin immediately after flowering.

Many consider the rose to be the queen of flowers. But, for example, the Chinese call the peony the king of flowers. Peony is not inferior to rose in beauty, and is more fragrant, and less demanding to care for. Although it cannot be left unattended. nine0003

Peony has faded: what to do next

The lush flowering of this beauty does not last long - only a few weeks. And what to do with the plant after flowering?

This period is very important for the peony. What and how you do in these few months after flowering will determine the quality of your plant's flowering next year. After all, it is at this time that the bush restores strength and prepares for wintering. Moreover, just during this period, renewal buds are laid in it at the base of the stems, from which new shoots will appear in the spring. nine0003

Work after peonies bloom can be divided into several stages. Let's start in order.

Stage 1 - cleaning

After flowering, the whole ground around the peonies is covered with their numerous petals. These remnants of beauty must be removed immediately, because they can become breeding grounds for fungal diseases. It is also necessary to remove all dry inflorescences from the plant.

Step 2 - Watering

Peonies need moist soil to develop flower buds. However, many gardeners immediately stop watering after flowering plants. You should not do this, because. the flower in this case will experience stress, which will lead to the formation of weakened buds. Because of this, next year the peony will not be able to please you with lush flowering. Watering is especially important if there is a dry summer. The amount of water should be reduced gradually. If you poured, for example, 25 liters under a flowering bush, then after flowering, begin to reduce this volume. First, reduce the dose to 15 liters, then to 10 liters, etc. until complete cessation. nine0003

Stage 3 - loosening the soil

This simple plant care routine should not be neglected. Heavy rain or watering leads to the formation of a crust on the surface of the soil, and this prevents the access of air deep into the soil. In this case, loosening will help. This will also save the peony from unwanted neighbors - weeds.

To make life easier, the soil around the peony can be mulched. Grass cuts, sawdust, and humus are suitable as mulch. nine0003

Stage 4 - feeding

Despite its relative unpretentiousness, peony loves top dressing. The plant needs them both in spring, during the period of active growth, and during flowering. But, perhaps, in the period that follows after flowering, he needs them most of all. How to feed peonies after flowering?

We recommend the first top dressing after flowering with organic fertilizers, such as mullein. Make a circular furrow around the bush. Pour the mullein solution (1:10) into it. Fertilizer will promote the active growth of the root system, the formation of stems and renewal buds. nine0003

Another root dressing should be carried out in August. This time we recommend using not organic, but complex mineral fertilizers. Since peonies do not need nitrogen in autumn, use phosphorus-potassium top dressing (30-40 g per plant) and apply it in the same way as mullein - into the groove around the bush. After applying dry fertilizer, the groove must be moistened and covered with earth.

In addition to root, after flowering, it will not be superfluous to carry out one foliar top dressing with microelements. To do this, in dry weather, spray the bush with a solution of trace elements. You can use, for example, liquid mineral fertilizer Agricola (dissolve 5 ml of the drug in 1 liter of water). nine0003

Stage 5 - cutting

Inexperienced flower growers rush to prune a peony as soon as its buds have fallen off. Do not do this! Everything has its time.

The process of photosynthesis takes place in the leaves, thanks to which the plant receives the nutrients it needs. Consequently, it is the stems with the leaves located on them that are the source of nutrition in peonies, as in other flowers. If you remove them, you will deprive the bush of these substances. The plant, of course, will not die from this, but you should not expect lush flowering from it. nine0003

If you want to cut a bouquet of peonies when the bush is flowering, take no more than 1/3 of all shoots. Otherwise, along with the flowers, you will take away the leaves from the plant - and with them the components necessary for photosynthesis.

Prune immediately after flowering the peony has only bare inflorescences. They are removed to the first healthy leaf.

If the autumn is warm, a peony cut too early will start to sprout. The first frosts will cause irreparable harm to your bush.

When can peonies be cut after flowering? It is impossible to name the exact time, because. it depends on weather conditions. We recommend focusing on the ambient temperature. After the first frosts, when the stems of peonies "fall down", they need to be cut off. In herbaceous peonies, the entire aerial part is removed. Remove the stems as close to the ground as possible, leaving no more than 2-3 cm.

Some gardeners cover the plants with cut foliage for the winter. We do not recommend doing this, because. stems can become a favorable breeding ground for pests. Cut plants are best collected and taken to a compost pit or burned. nine0003

Caring for tree varieties of peonies is somewhat different from caring for herbaceous varieties. Do tree peonies need to be pruned after flowering? Shrub peony species have strong tree-like stems (hence the name of the species). In no case can you cut them, because the flowering of these plants mainly occurs precisely on last year's shoots.

Such bushes need only sanitary pruning, which is best done in the spring. Dry, broken or weak branches should be removed from the peony bush. If necessary, formative pruning can be carried out every few years. nine0003

What else to do with peonies in autumn

In addition to the above-mentioned types of work that a peony needs in autumn, one can also name a transplant. If you have a large bush (at least 4-5 years old) or if it grows in an inconvenient place, it is better to transplant it. The best time for this is autumn.

Well, of course, you can't forget about protecting your pets before winter. We recommend mulching the ground around the bushes, for example, with a layer of peat or humus. The thickness of the layer varies depending on the weather conditions in your area - from 8-10 cm in temperate areas to 20-25 cm in places with more severe winters. nine0003

If you give your pet at least a minimum of attention, your unpretentious handsome peony will thank you next year with gorgeous blooms.

When to prune peonies after flowering.

When to prune peonies for the winter