Intersectional, or Itoh, peonies (named for Toichi Itoh, their original propagator) can be cut apart at the most narrow connections between larger pieces of root, each at least 6 inches long. These little cuttings have transformed into large flowering plants this year. Root division or grafting is the only way to propagate this. Planteck is dedicated to the tissue culture propagation of plants and was the first and is still the only lab in the world offering large quantities of peonies from tissue culture. Their blooms are large just like the tree peonies' and the foliage is like that of the tree peony as well. Toichi Itoh's Original Intersectinal Hybrids. Crown division, the traditional method of propagating all, but the woody peony types, works well with the Itoh Group sorts. When two years old the stock will be ready for grafting, the method being to select a rootstock which is about finger thickness and which has been cut back to about 8 in. The most common method of propagation for herbaceous peonies is crown/root division of plants that are 3 or more years in age. In 1948, Dr. Toichi Itoh, a Japanese horticulturalist, finally succeeded--and the Itoh peony was born. Herbaceous and Itoh Peonies . Crown division, the traditional method of propagating all, but the woody peony types, works well with the Itoh Group sorts. In late summer / early fall we collect seed pods from many different cultivars. When fertilizing in spring and summer, be sure to use a fertilizer that contains a low level of nitrogen, like 4-10-12. An old, neglected plant, divided properly, can produce dozens of new plants that bloom their first spring. from soil level a slanting cut is made in an upw⦠They are a cross between the tender tree peony and hardier herbaceous peonies. A third method is by branch layering. Join our family of passionate enthusiasts, including, botanical gardens, public gardens, gardeners, collectors, hybridizers, educators, scientists, floral designers and commercial growers. Learn how peonies from other groups are divided. Intersectional hybrid (Itoh) peonies are sterile and do not yield viable seeds. of soil level. During a propagation cycle (3 to 4 years), the underground stem (crown) extends somewhat with tuberous growth and swells with food storage similar in habit to the Lactiflora parent type, facilitating the process of division. Additionally, some Itoh Group cultivars, although not all, have proven successful in micro propagation (in glass, under sterile laboratory conditions). When a cultivar succeeds, a large number of its plantlets can be produced in a comparatively short cycle.  When grown large enough on artificial media to establish upon transfer to soil, those which survive the transfer can then be grown on to a size that can be cataloged for sale. This system has been going on long enough for production management challenges to have been resolved. The range of flower form typically is more like those of the Lutea Hybrid parent than those of the Lactiflora parent. Also the leaflets are much notched and pointed like those of the tree peonies. The flower forms vary from the classic Singles to rather full Semidoubles, some of them giving near Full Doubles at well grown maturity. Some give one flower to a stem, others will have up to two side buds, often opening in rotation, leading to an extended flower opening season ranging to three weeks (or longer where spring warm-up remains cool). Flowers open during the same seasons as the Lactiflora parent, the plant and flower adding extra weeks to a tree peony theme flower show when the three types are grown together. This changed in the early 2000âs when a Canadian company, Plantek, began producing the peonies in tissue culture, making them readily available to the market. Here's an Itoh hybrid whose colours change to spectacular effect in a mature plant with many flowers in different stages of fading. Check Out The BenefitsBecome an APS Member. Historically, Itohs were challenging to grow and thus hard to find and rather expensive. When it comes to peonies, nothing makes a lasting statement in your garden or living area like the Itoh Peony. ©2020 American Peony Society. To this we can now also add another category, the Itoh or intersectional peonies. In fall, you can divide Itoh peonies the same way you would divide herbaceous peonies. Herbaceous and Itoh peonies are propagated by root division, and sometimes by seed. In addition to creating new clones, this technique can also be used to make for a lower growing tree peony with a spreading growth habit. About 5 in. Crown division, the traditional method of propagating all, but the woody peony types, works well with the Itoh Group sorts. During a propagation cycle (3 to 4 years), the underground stem (crown) extends somewhat with tuberous growth and swells with food storage similar in habit to the Lactiflora parent type, facilitating the process of division. Tuberous food storage roots will similarly extend outward and downward, but will have a hard core, like the tree peonies. After a three or four year cycle, well grown plants will yield a comparable increase. The tuberous roots are of smaller diameter and longer than the common peony parent and somewhat less so than the woody peony parent. Adjust the length of tuberous root on individual divisions to retain an approximately equal amount of food storage for support of first year growth. Until recently, these incredible, colourful plants were scarce and difficult to reproduce, and gardeners could expect to pay $1,000 or more for one. Growing peonies from seed is as easy as growing carrots, except it takes a little longer, (about 3-5 years). But thatâs all changed. Itoh peonies are a hybrid cross between a bush peony and a tree peony, they are often known as Itoh peonies. Keep the bag closed and place it in a dark location with an average temperature of 70-75 F. (21-24 C.) until roots begin to form in the bag. from the crown. In the fall, cut them about four to six inches from the soil level. The primary method of clonal (copying) propagation for âwoodiesâ is through the procedure of grafting, that is the joining of woody peony stem to herbaceous peony root. When you are propagating peony plants, you should use a strong knife and cut the roots all the way back to only about six inches (15 cm.) A number of these micro propagated Itoh group peonies are now beginning to be offered for sale (inexpensively) in four inch pots. Concern involving the root growth pattern of micro propagated peonies is valid, as these plantsâ roots grow in a tight whorl, which is not an easily broken pattern. Mutations of flower and plant structures have also been more common with this type of propagation, but better laboratory techniques have been instituted to resolve this issue. Herbaceous peonies can be propagated by division in autumn. Grafting tree peonies can be done from late August into September and is a great way to propagate this often rather expensive plant. By planting peony seeds, new varieties will arise. A rounded growth habit makes this a very attractive addition to the garden. It blooms in the spring and their blooms make a good impression with the vivid colors and lush foliage. Peony cultivars are sold as being of P. lactiflora origin, as hybrid herbaceous (crosses within the Paeon section), as Chinese or Japanese tree peonies (referring to their origin and not botanical differences), or as hybrid tree peonies (crosses within the Moutan section). Remove as much of the garden soil as possible and with a knife cut off sections of the crown. Tree peonies are most often propagated by grafting or division. Tree peonies can be propagated by grafting, division, seed, and from cuttings, although root grafting is most common commercially. Though tree peonies do ⦠Their stems die back in the fall and must be cut back just like the herbaceous peonies. All rights reserved. Crown division, the traditional method of propagating all, but the woody peony types, works well with the Itoh Group sorts. During a propagation cycle (3 to 4 years), the underground stem (crown) extends somewhat with tuberous growth and swells with food storage similar in habit to the Lactiflora parent type, facilitating the process of division. Tuberous food storage roots will similarly extend outward and downward, but will have a hard core, like the tree peonies. After a three or four year cycle, well grown plants will yield a comparable increase. The tuberous roots are of smaller diameter and longer than the common peony parent and somewhat less so than the woody peony parent. Adjust the length of tuberous root on individual divisions to retain an approximately equal amount of food storage for support of first year growth. Each cultivar will have its own unique crown structure and a bit of investigation will be required to determine the best areas to cut away to create a division. In fact, thereâs a lot you can do with this hybrid peony from growing it in a perennial border to mixing it with other shrubs. All rights reserved. The lightly scented flowers have a long bloom time. Remove the soil from the roots so that you can see what youâre doing. Check Out The BenefitsBecome an APS Member. Bush and itoh peonies should be spaced approximately 2 to 3 feet apart. Adelman Peony Gardens Customer Service 503-393-6185. ... Propagation of peony plant. Carefully lift the crown with a garden fork or spade. You will want to make sure each piece has at least one crown bud. But due to new propagation techniques. Itoh peonies are hybrids between P. lactiflora and Lutea hybrid woody peonies, which is evident in their growth habits.  Their hybrid vigor draws upon their parents strongest traits and provides no nonsense culture. Propagate peonies in the fall as peony foliage is dying down. Open House: May 1st - June 15th, 2020 Tips for Protecting Peonies in the Winter. The most reliable way of propagating peonies is by division of the fat tubers that form the main root of the plant. A number of these micro propagated Itoh group peonies are now beginning to be offered for sale (inexpensively) in four inch pots. Concern involving the root growth pattern of micro propagated peonies is valid, as these plantsâ roots grow in a tight whorl, which is not an easily broken pattern. Mutations of flower and plant structures have also been more common with this type of propagation, but better laboratory techniques have been instituted to resolve this issue. When grown in raised rows, reset them so that the stem buds are deeper, to four or five inches below top of the raised rows, but not lower than the adjacent soil surface.  Moisture support during the first year is better when planted more deeply and the buds are protected from excessively wet conditions. So placed, when the stems grow in future seasons, they will form stem buds at multiple levels: the original crown level, very near or at the soil surface and one, two or three internodes in between on fully perennial portion of underground stems. This affords the gardener a maximum flexibility of propagation choices. The buds on perennial stems can be used for grafting scions, or, if left on the replant pieces, the extended stem can be positioned horizontally where all buds will put up stems, contributing to more rapid expansion of the bush in the following seasons. Alternatively, if taken up for dividing after three or four seasons, it may be found the growth at each of the original stem buds will have grown into a quality division which can be taken with a minimal dividing damage. Additionally, some Itoh Group cultivars, although not all, have proven successful in micro propagation (in glass, under sterile laboratory conditions). When a cultivar succeeds, a large number of its plantlets can be produced in a comparatively short cycle.  When grown large enough on artificial media to establish upon transfer to soil, those which survive the transfer can then be grown on to a size that can be cataloged for sale. This system has been going on long enough for production management challenges to have been resolved. Learn how peonies from other groups are divided. More cultural information that can applied to Itoh peonies. Join our family of passionate enthusiasts, including, botanical gardens, public gardens, gardeners, collectors, hybridizers, educators, scientists, floral designers and commercial growers. The Itoh Group cultivars (cultivated varieties, cvs.) Itoh peonies are much more available--and affordable! Cut the faded foliage back and lift the plant with a garden fork. Last year I grafted my first tree peonies in a class that was offered by my local peony society. Itoh peonies are sensitive to high levels of nitrogen. In 1964 Dr. Itohâs first crosses came into bloom. Unlike the commonly grown herbaceous peonies, overwintering stem buds on some kinds will form at the soil surface as well as a couple inches below. Occasionally one will discover a plant has formed one or more buds up stem, more like the woody peonies. Unfortunately, however, the stems which support those stray buds, as in the herbaceous types, having formed in the above ground light they will be weakly hardy and easily killed over winter. Most of the European and American âluteaâ hybrid tree peonies like ⦠The most successful and easy way to propagate Peonies is to the division. The stocks are readily raised from seed sown in spring under glass and grown on in pots throughout. Welcome to Planteckâs web site, THE place for Itoh, tree and herbaceous peony micropropagation. make up the most recently hybridized peony type to reach the ornamentals market place in quantity. These innovations are produced by crossing the Lutea Hybrid tree peonies (woody stemmed) with the long grown common herbaceous peonies, the Lactiflora cvs. Historically, attempts to succeed with this cross were for long met by failure. The first known success was for specialist peony grower, Toichi Itoh, in Japan, but afterwards widely repeated in the West. Thus the choice of cultivar group name made official by the American Peony Society in its capacity as International Registration Authority for peonies. When grown in raised rows, reset them so that the stem buds are deeper, to four or five inches below top of the raised rows, but not lower than the adjacent soil surface.  Moisture support during the first year is better when planted more deeply and the buds are protected from excessively wet conditions. So placed, when the stems grow in future seasons, they will form stem buds at multiple levels: the original crown level, very near or at the soil surface and one, two or three internodes in between on fully perennial portion of underground stems. This affords the gardener a maximum flexibility of propagation choices. The buds on perennial stems can be used for grafting scions, or, if left on the replant pieces, the extended stem can be positioned horizontally where all buds will put up stems, contributing to more rapid expansion of the bush in the following seasons. Alternatively, if taken up for dividing after three or four seasons, it may be found the growth at each of the original stem buds will have grown into a quality division which can be taken with a minimal dividing damage. ITOH Peony Hillary (Paeonia hybrid) feature large semi-double blooms that open a luscious shade of pink and age to cream with a pink tinge. Yellow intersectional peonies were first developed by Mr. Toichi Itoh of Japan in the 1940s. Characteristically, the Itoh Hybrid seedlings which have been named and reached the market place are among the best adapted of any peonies for use in a viewed landscape. They demand minimal care. Both are attractive and easy to grow. The flowers are unique, the form similar to those of the Lutea Hybrid parent but in a wider range of color expression. The plants are as easy to grow as their common peony parent, while the foliage can be expected to remain attractive throughout the growing season. Named for Toichi Itoh, the first hybridizer to successfully cross a tree Peony with an herbaceous Peony in the 1940âs, these popular gems are in high demand, prized for their huge, beautiful blooms and lush green foliage. Best offers for your Garden - https://amzn.to/2InnD0w ----- Can I Propagate a Peony From a Cutting?. Again, this is because the crown grows into the peony and dividing peony plants requires a crown on each piece you plant. While they have the mounded growth habit of herbaceous peonies and die back to the ground in winter, they also produce immense flowers like tree peonies⦠'Yellow Crown' was one of the original introductions by Mr. Itoh. ITOH Peonies have advantages over the other peonies in that: They have stronger stems and ⦠The procedure is not all that difficult, but requires practice and skill. While specific information on winter hardiness of most individual kinds has yet to be established, cold tolerance is generally similar to that of the Lactiflora parent cultivars.  Some of Itoh peonies are performing successfully at locations in the Canadian Prairie Provinces and Alaska. ITOH PEONY HILLARY Each. Raised beds and raised rows work well for Itoh cultivars, as it does for other peony types. It serves the valuable purpose of keeping the underground crowns of your peony plants safer from wet season extended water logging of soils. On flat sites do follow the general rule of placing your planter piece so the base of most stem buds will be about one to three inches underground. In raised beds or raised rows this can be deeper, sometimes of advantage (see below). These can be propagated by dividing in autumn after they have finished flowering and are starting to die back. One could expect to pay anywhere from $300-$1,000 for a single plant. An even more reliable method of propagating the tree peony is by grafting. 5690 Brooklake Rd NE PO Box 9193 Salem, OR 97305. info@peonyparadise.com. The best way to increase numbers in tree peonies is to graft them. Propagation. Another space-saving method of peony plant propagation is to place harvested peony seeds in a plastic sandwich bag with moist vermiculite and peat. There are two approaches which we have found will have good success. This is generally carried out under glass in spring on to seedling rootstock of P. moutan grown in pots. Like all peonies, Itoh Group kinds give the greatest rewards in a well-drained, fertile soil sites. If the desired planting site does not meet that standard, most gardeners will find it is well worth the effort to make it so. See elsewhere at this web site for discussion of planting site development. These cultivars have among the best hybrid vigor of any peonies, consistent with the wide differences between the inherent genetics of the two parent types. The foliage is less prone to leaf fungi than generally true of the Lactflora Group parents. Do follow the same annual late summer/early autumn cleanup against fungi as recommended for all peonies. How to Propagate Peonies. ©2020 American Peony Society. Tree peonies can best be spaced at least 4 to 5 feet apart. Plant Itoh peonies in full sun to part shade and in rich, well-drained soil. Big, semidouble and double blooms spanning 5â6" in diameter emerge as very dark pink to red before fading to a cream colour on the ends of the petals. Expensive plant seedling rootstock of P. moutan grown in pots throughout the place for,... An Itoh hybrid whose colours change to spectacular effect in a plastic sandwich bag with moist vermiculite peat..., will die back to ground level each autumn first tree peonies do ⦠peonies. With many flowers in different stages of fading the plant with many flowers in different stages fading. Peony society and tree peonies in full sun to part shade and in rich, well-drained soil, well-drained.. Ground level each autumn new plants that bloom their first spring that form main. 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