The Itoh peony, sometimes called the intersectional peony, is a cross between tree peonies and typical herbaceous peonies that combines the best features of both of its parent plants. As a result, Itohs produce massive, long-lasting blooms, sturdy stems, and lush, deeply lobed dark green foliage that lasts through the fall. Itoh peony come in a range of vivid colors, including yellow, coral, pink, red, and white, and have blossoms that can stretch out to be up to 8 inches across.
Although the foliage develops quite quickly, these plants mature rather slowly; seedlings may take three to four years to reach blooming maturity. A good, robust one-gallon nursery specimen, however, might give you blossoms in its first year because potted nursery plants are typically at least two years old before they are marketed. Expect rather slow development in the first year or two if you are purchasing bare roots via mail order.
Due to the paeonol found in the leaves, roots, and stems of peonies, they are slightly toxic to dogs, cats, and horses.
What distinguishes a peony from an Itoh peony?
In nurseries, peonies are available as potted plants as well as bare roots for planting. Peonies are available as bare roots for planting both in the fall and in the spring from online merchants including Holland Bulb Farms and Tulip World. Bare root peonies planted in the spring should develop that summer, but blooms won’t likely show until the following spring. There is no need to be concerned if you have to wait a year or two for blooming because peonies have a lengthy lifespan of up to 75 years or more.
In any sunny garden bed or border, both herbaceous and Itoh hybrid peonies have a place and a purpose. The strength of the stems, the hues of the blooms, and the timing of the blooms are the key variations between the two. The Itoh hybrids bloom a little later in spring and have a tendency to have a longer bloom time than the herbaceous peonies, which bloom earlier in the season. Plant both herbaceous and Itoh hybrids to extend the bloom period if you really love peonies and have the room. The most typical hues of herbaceous peonies are pink, red, white, yellow, and peach. Although itoh hybrids are also available in variations of those hues, the variety of hues visible in the blooms is higher than that of herbaceous peonies, which tend to have more uniform hues. You can enjoy the beautiful, fragrant flowers of Itoh hybrids and herbaceous peonies for several weeks every spring for years to come by planting both varieties.
What distinguishes peony from Itoh?
Itoh peonies, which are hybrids of herbaceous and tree peonies, thrive in a variety of conditions and have magnificent foliage, enormous blooms, and a wide range of color options. In Zones 4–9, hardy.
If you delve deeper into the magnificent beauty of the Itoh peony, you’ll find an inspirational tale of tenacity. An Itoh peony is produced by crossing a typical garden peony (Paeonia lactiflora) with the eye-catching tree peony (Paenoia suffruticosa). For many years, plant breeders believed that because these two peony kinds have such dissimilar parents, a successful hybrid of them would not be possible.
Toichi Itoh, a Japanese plantsman, worked tirelessly to complete this cross. Itoh made this pursuit his life’s work and succeeded in 1948 by breeding the tree peony (Paeonia lactiflora ‘Kakoden’) with the herbaceous peony (Paenoia x lemoinei). 36 plants were born from the productive cross. Nine of those plants exhibited tree peony traits and were dubbed Itoh peonies or Itoh Hybrid peonies. Intersectional peonies and intersectional hybrids are occasionally mentioned. These plants are Itoh peony subspecies.
There were so few Itoh peonies available when they were originally made available to the public and presented to the nursery industry that the cost of one plant exceeded $1,000. The lengthy process of raising these plants to the point where they could produce divisions was reflected in the expensive price tag. The cost of Itoh peony has decreased to between $50 and $100 per plant thanks to the use of tissue culture techniques, which multiply them more quickly.
Because they produce flowers and foliage that resemble tree peonies on a plant that acts like a perennial, Itoh peonies are worth paying any price for. Each year, when the first frost hits, the plant dies back to the soil, and the next spring, fresh growth appears from the ground. This puts an end to concerns about a tree peony’s bloom buds on woody stems being damaged by a late spring frost.
When an Itoh peony’s flower buds open, they reveal big, tree peony-type blooms that are dinner-plate size and come in a variety of colors, including golds and yellows that are less common in herbaceous peony varieties. Despite the huge bloom heads, there is no need to anchor the plants because they have sturdy stems similar to those of a tree peony. A mature Itoh peony has a blooming season that can yield up to 50 blossoms.
The Itoh peony group achieves its optimum bloom time while the herbaceous peony group is completing. Itoh peonies often begin flowering when herbaceous peonies are in bloom. There is a strong, protracted floral display because many Itoh peony plants generate flowers from secondary buds that develop beneath the first flower. Three to four weeks are a luxuriously long flowering period for each Itoh peony plant.
In the garden, Itoh peony hybrids have strong resistance to powdery mildew, which afflicts herbaceous peonies, and botrytis blight, which frequently affects tree peonies. They are also deer-resistant. The Itoh peony group has blossoms that create excellent cut flowers, just like its peony progenitors. Itoh peony typically reach heights of 2 feet and a width of 3.5 feet.
Do Itoh peonies have several blooms?
At my property in Bedford, New York, I’ll have more stunning peonies blooming than ever in the spring.
I simply like peonies and have always been a collector of them. At one area of the farm, I have a lengthy peony border planted beneath the semi-shade of colossal sugar maple trees. Just over the carriage road from my house, I have a huge bed that is exclusively planted with pink and white herbaceous peonies. I’ve also planted tree peonies in the garden that’s buried into the ground behind my summer house. I recently acquired a sizable collection of intersectional Itoh peonies grown by Monrovia, a nationwide wholesale nursery with a focus on well-cared-for shrubs, perennials, annuals, ferns, grasses, and conifers. I made the decision that the formal Summer House garden beds encircled by my boxwood hedges would be the ideal location for these hybrid peonies. I can’t wait to see them blossom in May after my gardeners planted about 50 yellow and salmon Itoh peonies yesterday.
I am a devoted and enthusiastic gardener, and I am constantly seeking for methods to make all of my garden beds more beautiful and interesting. I had already planned where I would put these peonies when they arrived. They all hail from Monrovia, where more than 18 different varieties of these are grown “Peonies from Itoh
This magnificent ‘Bartzella’ Itoh peony is one among the kinds we got. Itoh peonies are crossbreeds between tree peony and herbaceous peonies. In the 1940s, Dr. Toichi Itoh, a Japanese botanist, was the first to successfully mate tree peony pollen with herbaceous peony ovary. This one has extraordinarily big, vivid yellow blooms. The center is a richer yellow than the outer layers, which are initially a lighter shade of lemon meringue. Flares of red are hidden within the puffy flowers. Additionally, “Bartzella” smells a little peppery. (Monrovia photo by Doreen Wynja)
This Itoh peony is known as “Singing in the Rain,” and it has enormous, semi-double, creamy blooms with exquisite apricot-salmon flushes. The flowers are presented on long stalks that are ideal for cutting, and they have a gentle, pleasant aroma. (Monrovia photo by Doreen Wynja)
“Pink Double Dandy” is this. When in bloom, it displays a dense mound of dark green foliage above big, semi-double to double, faintly fragrant blooms on sturdy stalks. When ripe, the blossoms have a deep lavender-pink color. After then, the petals turn a light pink and the center’s collection of yellow stamens is visible. Leading Itoh Peony breeder Don Smith created this variety through hybridization. I’ll include a few of these pink peonies in my tree peony border. (Monrovia photo by Doreen Wynja)
I desired the formal rectangular beds behind my Summer House to be planted with the yellow and apricot peonies. To create way for the peony plants, the hostas were moved to a different location.
One of the beds is shown here, cleared and prepared for planting. Numerous white snowdrop bulbs that blossom in the spring are also present beneath the earth.
All of the peonies are neatly arranged in lines and are color-coded by Ryan in the bedsall.
To give these peony plenty of opportunity to grow, they are spaced about three feet apart. Peonies from Itoh produce lots of blooms. On a strong, mature plant, they can expand furiously to three feet tall and four feet wide, and they can produce up to 60 blooms in a second group.
Brian is shown here as he begins to sow more than 20 seeds in this bed. Itoh peonies, also known as intersectional peonies, have traits in common with both its tree and herbaceous parent plants. They produce huge, long-lasting blooms and sturdy stems that don’t need to be staked, just like tree peonies. Additionally, they have rich, deeply lobed foliage that is dark green and last into autumn. Additionally resistant to peony blight are Itoh peonies.
Even though these plants are currently dormant, notice all the stems. These are mature plants as well, so next year should see stunning blooms that measure up to eight inches wide.
The hole is first dug by Brian, at least twice as big as the plant. The ideal planting conditions for itoh peony include rich, well-drained soil and full sun to part shade.
After the hole is dug, Brian uses the potted plant to gauge its size.
The dirt around the hole and in it is then liberally fertilized by Brian. I typically say, “Your plants should eat if you do. For these plants, we’re using Roots fertilizer with mycorrhizal fungi, which improves water and nutrient absorption while helping transplant survival. Itoh peony are susceptible to high nitrogen levels, so use a fertilizer with a low level of nitrogen when fertilizing in the spring and summer.
These peony are in wonderful shape, and Brian gently removes the plant from its container. Then, in order to promote growth, he gently loosens the roots with his hands.
The tops of the stems on the peony in this picture should be just level with the ground.
This peony is the ideal height and should survive the cold weather with no problems.
Brian then fills the hole with soil, making sure it is tightly packed and that all of the stems are completely encased.
Brian makes sure the peonies are planted in absolutely straight lines down the bed by using the empty upturned pots as markers because the plants are trimmed down and don’t currently have any leaf.
Following the planting of all the peonies in the section, the entire area is top dressed with an additional layer of soil before being raked evenly. Due to the numerous side buds that bloom in succession, these Itoh peonies are late midseason plants and will flower in late spring to early summer for three to four weeks.
Next May, these beds will be awash in color. These Itoh peony are strong and resilient to the cold. These aromatic plants can live for 100 years or even longer if planted and cared for properly.
What three varieties of peony exist?
About 30 species of flowering plants in the family Paeoniaceae make up the genus peony (genus Paeonia), which is distinguished by its enormous, spectacular flowers. The majority of these species are produced as ornamentals and for the flower industry, with the exception of two that are native to Europe and Asia.
Peonies can be divided into three different types: herbaceous Eurasian peonies, Asian tree peonies, often known as moutan peonies, and North American peonies. The perennial herbaceous peonies can reach heights of approximately one meter (about 3 feet). They feature broad, glossy leaves with numerous divisions that grow on annual stems made by fleshy rootstocks. They produce enormous single and double flowers in the colors of white, pink, rose, and deep crimson throughout the late spring and early summer. The majority of the well-known garden peonies are descendants of the fragrant Chinese peony (P. lactiflora) and the European common peony (P. officinalis). P. lactiflora has produced hundreds of cultivated varieties, including Japanese forms with a cluster of partially developed petals in the center and one or two rows of petals on either side (petaloid stamens).
Which Itoh peony is the best?
Itoh Peony “First arrival,” which is regarded by some gardeners as one of the best Itoh Peonies, blooms among the Intersectional Peonies among the earliest. It is magnificent, with huge, lavender-pink, semi-double blooming up to 8 inches (20 cm) across, each with a flare of reddish-purple at the base. The rose-scented, intensely magenta-flushed blossoms progressively lose their color as they get older. The blooms are abundantly produced (expect 30 to 40 blooms! ), are well-presented above the lush foliage, and are supported by sturdy, upright stems. ‘First arrival’ is a robust and freely flowering perennial that is great for cutting or the perpetual border!
- Due of the numerous side buds that develop sequentially, this midseason peony will bloom in late spring to early summer for 2 weeks (up to 4 weeks in cool temperate regions).
- If cut in bud, makes beautiful cut flowers with a lengthy vase life (over a week). At home, enjoy a stunning arrangement of yellow peonies!
- This Itoh peony is dependable and robust, growing in a small but wide-spreading bush with lustrous, dark-green foliage. reaches a maximum height of 28 inches (70 cm) and a maximum spread of 4 feet (120 cm). Throughout the summer and into the late fall, the foliage is still beautiful.
- Deer and rabbit resistant, but butterflies like it!
- virtually free of pests. Watch out for peony wilt and honey fungus.
- incredibly practical and flexible in the landscape. Perfect for borders and beds, city gardens or country gardens, both individually and in groups as a specimen plant. Ideal for using as an informal hedge and to border a walk or driveway. Peonies don’t like to fight for food and moisture with trees or shrubs, so plant your peonies away from those plants. Roses, bearded irises, and other perennials make stunning color combinations with the alluring peony blossom.
- easy to maintain. Cut back the plant after the foliage has fallen back in the fall, then remove any faded or wasted flowers. Peonies have a long lifespan (up to 50 years! ), therefore the plants don’t need to be divided and can be left alone for a long time. Selecting the right planting place is important since peonies do not adapt well to transplanting.
- Early fall is the ideal time to plant peonies so that they have time to establish themselves in the ground before winter. Their gorgeous, fragrant blooms may not appear for up to two years after planting since they do not flower the first year.
- Itoh Peonies are hybrids made when a tree peony and a herbaceous peony are crossed. These peonies don’t need to be staked and produce up to 50 or more enormous flowers on strong, short stalks. For 3–4 weeks, they often bloom following the herbaceous peony. They are prized for their wonderful variety of golden and gold colors, which are not frequently found in herbaceous peonies, and are excellent as cut flowers. Although these flowers have the magnificent tree peony leaf form, they wither to the ground in the winter like herbaceous peonies. They are often shorter than the majority of bush peony, yet strong and healthy with a lovely rounded bush appearance. They can be planted at the front of the border because of their wonderful shape and compact form, which can reach heights of up to 2.5 ft (75 cm) and a width of about 3 ft (90 cm). like full sun or partial shade in healthy, rich soils with a medium moisture level and good drainage. Even though they thrive in full sun, peony plants can tolerate a little midday shadow. Provide a protected area. Due to their propensity to arch downward and their vulnerability to being knocked to the ground by heavy rain, huge peony blossoms may need to be staked.