Woody perennial shrubs called tree peonies are. After woodland peonies but before herbaceous peonies, they bloom in the early spring. They have enormous dinner-plate-sized flowers on up to 7-foot-tall stems that are supported by their woody structure. Tree peony may tolerate full sun, but they prefer dappled light to grow. After blooming, tree peonies provide the garden structure with their deep green summer foliage that turns bronze and purple in the fall. These deer-resistant plants are native to China and have been grown there for millennia. They do well in zones 4-9. In zone 4 during especially hard winters, some die-back might happen. A tree peony’s annual growth of new woody growth ranges from 1 to 6 inches. They need soil that drains well. a landscape-friendly plant. regal, uncommon, breath-taking blossoms, truly amazing.
Where should tree peonies be planted?
The majority of tree peony are hardy in zones 4–8, although some cultivars are hardy as low as zone 3. They thrive best in regions with hot summers and cold winters for dormancy. Tree peony prefer some dappled to light shade from the sweltering afternoon sun while being typically listed as full sun plants. The lovely blossoms may fade and wither more quickly if there is too much bright sunlight.
They require sufficient drainage and love slightly alkaline soil. Additionally, tree peonies favor a location free from competing tree or shrub roots. With perennial companion plants, they thrive.
Instead of in the sweltering summer, new tree peony plants should be planted in the spring or fall. At initially, they may take up to three years to become established and begin to develop and bloom. Tree peony do not transfer well and may tolerate drought once they are established. A plant can live up to 100 years if it is placed appropriately and is happy with its surroundings.
Gardening for tree peonies is not any more difficult than gardening for herbaceous peonies. However, tree peonies should never be pruned back in the fall, unlike herbaceous peonies. Tree peony should never be trimmed or shaped; only dead, unhealthy, or infected wood should be removed.
They may benefit from a yearly feeding of iron sulphate and bone meal in the spring since they have high iron and phosphate requirements. A general-purpose fertilizer like 5-10-5, which is higher in phosphorus than nitrogen and potassium, should also be applied regularly to tree peony.
The best way to water tree peony is directly at the root zone because they can be vulnerable to fungus illnesses. Borers can also harm them, so be vigilant about looking for evidence of their activity in the wood.
How much sunlight do tree peonies require?
It’s crucial to start with robust nursery stock and place a fresh planting in a location where it will grow because peony of all varieties can be perennials that live for exceptionally extended periods of time while also requiring little maintenance.
Every kind of peony requires:
- pH of 6.5-7 indicates fertile, well-drained soil that is mildly acidic to neutral. Never put in a peony in a wet spot or one where there is long-term standing water.
- Peonies of every variety will flourish in direct sunlight. Herbaceous and intersectional peonies require at least 6 hours of direct sunlight per day to flourish well. Tree peony grow vigorously and do well in full sun, but growing them there has the drawback of having flowers that fade very rapidly.
- In regions with diffused sunlight or an eastern exposure that receives morning sun and afternoon shade, tree peony will also thrive and produce flowers. The flowers will stay longer, but growth will be a little slower than in the full sun.
You can still grow lovely peonies if you garden in an area with heavy clay soils, depleted soils, and/or very acidic (low pH) soils as long as you take the right procedures to amend the soil in the new peony planting area. In order to give the peony with long-term nourishment, this basically means changing the pH of the soil to the proper level, creating looser, more permeable soil in places of thick clay, and adding enough organic material to deficient soils. Spending a little time and effort now can result in years of gorgeous flowers. We hope the video and illustrated step-by-step instructions below will help you establish the best area for planting peony. Send us an email at if you have any queries.
How to create a fresh peony bed for planting in the fall in an unimproved or lawful area, step by step:
If you’re planting peonies in a new garden space, pick a spot that gets six hours of sun per day (tree peonies will also grow well in dappled shade, but if you are planting herbaceous or intersectional ponies, select a full sun location.) Peonies also need a well-drained environment as a basic requirement.
Make sure the soil in the garden bed is deep enough to support the vast root system of a peony. If the soil is rocky, don’t worry about it; just avoid planting where there are only a few inches of soil above a boulder or rocky ledge.
Our soils in New England are frequently sandy and rocky, as well as having low levels of calcium and phosphate. The native soil in our region has a pH between 5.0 and 5.5, which is far too low for good peony production. Fertility can be increased by amending deficient soils. It’s always a good idea to have your soil tested so you can determine the baseline fertility and mineral levels in your soil.
Peonies should be grown in raised beds or mounds in thick clay soils with poor drainage. Making raised beds can enhance many garden areas.
To our planting space, which is 3 × 3 feet, we apply 2 pounds of each of the following soil-building supplements.
How big can you grow a tree peony?
No garden should be without the majestic, long-lasting woody shrubs known as tree peonies. Some types have plants that can produce fragrant flowers up to 10 inches in diameter and grow to heights of 45. Tree peonies are hardy from Zones 4 to 8, do well in the Northeast and Midwest, and flourish in climates with cold winters and hot summers. Tree peonies can be forced into dormancy by gardening in Zone 9: remove all foliage in November, leaving the woody stems, and do not water or fertilize. Hopefully, this will cause the plant to develop blossom buds.
Tree peonies may take three years to develop and begin blooming, so they are not a plant for the impatient gardener. Also keep in mind that it could take several seasons for a new plant’s flowers to bloom to their full potential. Having said that, there is nothing quite like a Tree Peony in full bloom; it is a breathtaking sight.
Before they blossom, Tree Peonies require some time to acclimate; it’s not uncommon for a plant to hold off until its third spring. Additionally, the first spring following planting, Tree Peonies may take longer to emerge from dormancy. Although your plant might appear to be dead while its neighbors are coming to life, it will soon reawaken.
Light/Watering: Flowers need some light protection from the sweltering afternoon sun. In China and Japan, little parasols are used to screen the plants from the sun. Plant tree peonies where they will be shielded from the winter and summer winds that can dry them out. Once established, Tree Peonies are exceptionally drought tolerant. Avoid overwatering plants, and keep them away from automatic irrigation systems. Prior to heavily watering, allow the soil to dry to a pH of 4. The roots will be killed by excessive watering, which is a common cause of failure.
Tree peonies require fertilized soil with a pH that is somewhat above neutral or close to neutral. When planting, add a few handfuls of lime if your soil is acidic. Remove the green plastic ribbon that is wrapped around the stem’s main portion before planting the plant at the depth specified by the ribbon. In order to stimulate the scion to develop its own roots if the ribbon has become dislodged, plant the top of the graft union, which is visible as a bulge on the main stem, approximately 46 below the soil’s surface. In the spring, topdress plants with an inch of aged manure or compost. During the growing season, foliar feeding with fish emulsion is beneficial.
Pests/diseases: On rare cases, you might discover a boring insect-caused hole in the wooden stem. Using a thin wire or by just cutting out the troublesome part, you might be able to kill the larva in the tunnel. Like Herbaceous Peonies, Tree Peonies may contract fungal infections that result in leaf blackening and wilting. As soon as unhealthy foliage is seen, it should be removed. In the fall, make sure to pick up any plant pieces that have fallen. Spray with a fungicide early in the spring and repeat the treatments for a few weeks if fungal diseases start to be an issue. Deadhead flowers regularly and avoid letting dropped petals get stuck in the plant or on the ground.
Companions for Tree Peonies are Hellebores, Alchemilla, Leucojum, Epimedium, and Siberian Irises. Underplant with bulbs that bloom in the spring if your plants have a tendency to be leggy.
Pruning: Unlike their herbaceous siblings, Tree Peonies should never be cut back to the ground. After plants have flowered, remove any broken or damaged stems by pruning. Once your plant has matured and is thriving, you might wish to make a small opening in the center to promote flowering on the taller stems and improve airflow. When Tree Peonies are grafted into Herbaceous Peony roots, the rootstock will occasionally send up a shoot from the plant’s base. These need to be taken out right away.
Dividing/Transplanting: Tree Peonies do not require division, and it is impossible to do it with numerous plants. When dormant, young plants can be transplanted; when digging the plant, try to keep as much soil around the roots as you can.
End-of-Season Care: After a deadly frost, remove all leaves, including leaf petioles, and dump it elsewhere, not in the compost pile. Mulched new plants should also have burlap or another material wrapped around them to block winter winds in the coldest climates.
Topdress plants with an inch of old manure or compost in the early spring. Keep an eye out for symptoms of a fungus infection and administer treatment as necessary. Remove any shoots that appear from the rootstock.
Mid-Spring: Due to their heavy blossoms, certain types may require assistance. To increase airflow, thin out any foliage that is too densely packed inside the plant.
Avoid overwatering in the late spring. Deadhead blooming promptly, and take out old flowers and petals from the garden.
In the summer, water plants only when the earth has dried to a depth of four inches. Fish emulsion feeding of the foliage is preferred.
Fall: Tree Peonies are woody shrubs; do not cut them back. After the first frost, remove all foliage; do not compost. Mulch newly planted vegetation and vegetation produced in colder climates, and if brisk winter winds are predicted, wrap vegetation in burlap or another windproof material.
What distinguishes a peony from a tree peony?
Tree peony are actually small bushes, not trees, and they bloom in May and June with stunning goblet-shaped flowers. Tree peonies are higher and maintain a constant framework throughout the year, in contrast to herbaceous peonies, which die back every year.
How to grow tree peonies
In the fall, plant tree peonies in wet, well-drained soil in a location that receives some to all of the shade. Except for those that remain quite moist over the winter or are on the acidic side, most soils are good. When buying, plant them somewhat deeper than the soil level in their container.
Cut off any suckers that you notice at the base of your tree peonies because they are growing from the rootstock and will look different from the rest of the plant.
Can peonies tolerate shade?
In the early 1980s, I threw a dinner party for a few friends when I first met Kasha. I gave her a tree peony blossom from my small garden at the end of the party in the hopes that it would inspire romance. It did. We started planning for our wedding and the peony garden we would create together shortly after that.
We looked for a suitable garden location for more than a year. This was nothing compared to our plant-finding expedition. We spent years writing to people and organizations in China because we specifically wanted to grow Chinese tree peonies that were not easily accessible in the United States. When we did locate someone, they insisted that we buy a large number of plants. We hurried to sell the remainder because we just wanted a handful of the top examples. However, over time, our love of tree peonies has grown into a full-time company.
Tree Peony Paeonia suffruticosa (Pay-own-ia suf-froot-i-cosa)
- a slow-growing, woody shrub with huge, silky blooms that grows 4 to 10 feet tall.
- USDA Hardiness Zones 3 to 9-compatible (40F to 20F).
- Flowers thrive in three to four hours of light and partial shade.
- Plant on a hillside or in a raised bed with lots of organic debris if you want good drainage.
- Compost should be added to the soil, and in the spring, seaweed or fish emulsion should be sprayed onto the leaves.
Herbaceous peonies and tree peonies: Distinctly different plants
There are two primary varieties of peonies: herbaceous forms and tree forms. Herbaceous peonies have flowers that are 6 inches in diameter, grow to a height of 4 feet, and are simple to divide. They can produce 40 or more blossoms on a mature plant, and they do well in USDA Hardiness Zones 4 to 7 (30F to 0F). After the first cold, the majority die back to the ground after blooming in early to mid-June.
But the tree peony is a completely other kind of flower. Woody plants called tree peony can reach heights of 10 feet on their own. Their flowers are more bigger and typically bloom two weeks earlier than herbaceous peonies. They come in a wide variety of forms, colors, and perfumes. Even though they shed their leaves in the fall, they continue to have a lovely branching structure all winter long. In USDA Hardiness Zones 3 through 9, tree peonies can be grown (40F to 20F).
Tree peonies prefer dappled shade and good drainage
Tree peonies require moderate shade with three to four hours of sunlight, as opposed to herbaceous peonies, which bloom best in full sunlight. In the light, plants develop more quickly, but blooms burn and wither within a couple of days. In order to promote plant growth, we occasionally plant tree peony in full sun. However, we shade the blossoms with a parasol or fabric umbrella, which rewards us with blooms that last a week to 10 days.
Tree peony require a location with good drainage, such a hillside; standing water will destroy them. Although they don’t have any preferences, a pH range of 6.5 to 7.0 is optimal.
Unlike herbaceous peonies, tree peonies require a rest period of several weeks with temperatures between 35F and 40F before blooming. They flourish as far south as Tuscaloosa, Alabama, because of this. They can withstand temperatures as low as 30F in the winter in southern Minnesota, where they are hardy.
Tree peonies: Diversity is their hallmark
Tree peonies are divided into Itoh, or intersectional hybrids, and Chinese, Japanese, European, and American hybrids. The species Paeonia suffruticosa is commonly regarded as the parent of tree peonies. Although peony taxonomy is a complicated topic, recent research suggests that Chinese tree peonies may possibly be hybrids of two or three species. Cultivar names are the easiest to understand and recognize in the nursery industry. The names “White Light in the Night,” “Amber Moon,” “Tiger Tiger,” “Necklace with Precious Pearls,” “Princess Zhao Marries Beyond the Great Wall,” “Intoxicated Celestial Peach,” “Coiled Dragon in the Mist Grasping a Purple Pearl,” “Great Winged Butterfly,” and “Taoist Stove Filled with Pills of Immortality” are simply delightful.
Since the Sui Dynasty in the seventh century, the Chinese tree peony, or mudan, has been the nation’s favorite flowering plant. In fact, others have compared its popularity to the tulip frenzy that swept over Holland in the 17th century.
We concur that the Chinese characterize the mudan blooms as velvety. While some blossoms have a diameter of a foot, the majority are 8 to 10 inches. The Chinese cultivars of tree peony have the most range. Flowers can be white, pink, red, magenta, maroon, violet, or multicolored. They can also be any shade of these hues. Some flower petals have frosted tips, while others have darker centers. The petals’ colors frequently morph before your eyes when light hits them, relaxing in the sunlight. Flowers with light yellow petals turn lavender as they transition from light yellow to white.
In general, flower shapes can be categorized as solitary, semidouble, or double. But there is a lot of variety even within these categories. The single, light semidouble, heavy semidouble, double, ruffled ball, thousand petal, crown, and rumpled forms have all grown on our plants. Additionally, flowers might be looking up, to the side, or downward. We think that everyone belongs in the garden.
The smells of many Chinese tree peony range from sweet to peppery and occasionally even woodsy. Grand Duke Dressed in Blue and Purple, one of our favorites, with an unfathomably wonderful perfume. Let’s simply say that the aroma of heaven would be similar to that of a candy store. We plant roughly 80 of the over 600 tree peony cultivars that the Chinese acknowledge in our Connecticut garden.
The tree peony was introduced to Japan by the Chinese as a medicinal plant in the eighth century. In the 17th century, it was once more presented to Japan, but this time for its beauty. Since the plants haven’t altered in the 400 years that have passed, we believe that many of the Japanese tree peonies that are grown in Japan now are actually Chinese tree peonies.
There are, of course, exceptions. One of them is “Island Brocade,” a variation of “The Sun.” It produces gorgeous variegated pink and red flowers. The Japanese only plant single and semidouble varieties, which bloom about a week after the Chinese mudans, for their own aesthetic reasons.
Japanese cultivars of tree peony are the most widely accessible in the United States. Both local garden centers and mail-order suppliers offer them for sale.
A new species (Paeonia lutea) with tiny, yellow flowers was introduced to the West about 100 years ago. It has been crossed with semidouble types over the years in both Europe and the US. A.P. Saunders carried out this hybridization in the United States, and as a result, numerous plants bear his name today. The flowers have a beautiful citrus-vanilla scent and are smaller, frequently pointing sideways or downward. They lengthen the tree peony bloom season by blooming later than either the Chinese or Japanese tree peonies.
Nassos Daphnis and David Reath’s second generation of hybridization has resulted in flowers that are bigger and have a wider range of colors. Flowers like “Redon” and “Exotic Era,” which have yellow undertones, are highly prized.
Toichi Itoh, a Japanese hybridizer, was successful in fusing herbaceous and tree peonies about 30 years ago, expanding the range of hues available in peonies. These intersectional or Itoh hybrids are a botanical wonder; they resemble herbaceous plants in the fall yet have the leaves and petals of tree peony.
Plant peonies in the fall
All peonies should be planted and moved in the fall. Tree peony should be planted at least six weeks before the ground freezes; planting in the spring just does not give the roots enough time to grow, and as a result, they are unable to sustain the emerging leaves. As a result, peonies planted in the spring frequently become weak or die, earning them the unjustified reputation of being difficult to grow.
Make a hole that is 2 feet in diameter and deep to plant tree peony. Create a hill in the center of the hole and cover it with the roots of the tree peony. When filling the hole back up, use high-quality garden soil that is rich in organic matter, and water it well both halfway through and at the end. It’s very challenging to plant tree peony too deeply, so make sure all shoots are buried. Also, keep in mind that tree peony have a tendency to grow rather large, so leave holes around 5 feet apart. It’s a good idea to mulch your peonies the first year if plants in your environment are prone to heaving.
Tree peonies are heavy feeders
Tree peony tend to be heavy feeders because they have numerous leaves and huge blossoms. Even though we don’t fertilize them before planting, we do provide them with compost in the years that follow. Any compost that is readily available should work, with the exception of fresh manures, which require time to decompose.
Instead of piling the compost on top of the soil, we dig a 1-foot-deep by 1-foot-wide trench and fill it with the compost along the plant’s drip line. Once roots have penetrated the trench for a year or two, we repeat the procedure farther out. In the spring, we also apply a foliar spray to our tree peony, such as fish emulsion or seaweed. We use this same solution to irrigate the plants once they have bloomed.
Tree peonies are incredibly robust plants. They usually return, even if you run over them with a lawnmower. They are nearly pest- and disease-free when taken care of properly. We deadhead the flowers after they bloom, and in the fall, we remove all the leaves that have fallen. Botrytis doesn’t infect the plants in the spring because to this cleansing.
The rose borer is the only insect pest that we are aware of that feeds on tree peony. From spring until fall, it burrows into the pith of elder plants and lays its eggs. You should remove the impacted wood if you notice its telltale hole or a wilting branch.