In our USDA zone 6, the best period to graft tree peony is from mid-August to early-October. The most effective way to create a new clone of an existing tree peony variety is through grafting. An under-stock of either a tree or herbaceous peony root is used as the under-stock in this age-old procedure, along with a bud from the chosen variety. This nursing root acts as a “battery,” supplying the new growth with energy for a year or two until it establishes its own roots. margin-left: auto; margin-right: auto; display: block; float: none;
The fact that grafting, a time-consuming and labor-intensive technique, is still the most efficient method of asexual replication, or cloning, is one of the primary reasons tree peony continue to be expensive plants. According to one source, tree peony can be successfully planted from summer cuttings (SOURCE! ), but humidity and temperature must be carefully regulated. This is exceedingly challenging, and as far as we know, no production environment does it. Although some reports of tree peony cell tissue micropropagation success have surfaced, widespread success has so far proven difficult. In Japan, China, and the United States, tree peonies are propagated via time-honored grafting methods.
As it has been for years, grafting will continue to be a crucial ability for gardeners to grow woody plants. For those committed gardeners looking to grow their own tree peony, we offer here a low-tech method requiring little specialist equipment.
From the middle of August to the beginning of October, cuttings can be obtained from tree peony. The stem hasn’t yet grown too woody during this time, and the buds are a nice size. For trimming, choose large terminal buds. Scions are the name given to these cuts. There should be at least one terminal bud on each scion. It would be ideal if you could also obtain a secondary bud.
Trim the leaves after cutting your scion. Lower down on the branch, leaf buds are beginning to grow. Recognize that by pruning the terminal buds, you are also pruning the flower buds for the following year. Any peony gardener might find it difficult to accept this, but a new tree peony can provide some solace.
The scions can be kept in the refrigerator wrapped in a moist paper towel in a sealed plastic bag if you are not planning to perform your grafting right away. This method of storing scions should keep them alive for several weeks.
The greatest herbaceous roots come from 2-year-old seedlings that have had their “eyes” removed. Roots in seedlings are very important. A good, healthy piece of root from any herbaceous peony will work wonders if you don’t have any seedlings. You can either dig up the entire plant and cut what you need to get roots from an established plant, or you can get a few roots by digging around the clump. You will need 5-7 pieces of healthy, unharmed herbaceous roots for each graft. Keep track of the root’s terminal end at all times.
The day before you want to graft, pluck and clean your herbaceous roots as much as possible. They should be kept in a cold, wet area. When you’re ready to graft, this will enable them to become a little less brittle and a little more elastic. Herbaceous roots that have just been harvested can also be used, but they are quite fragile.
Roots from ‘Phoenix White’ tree peonies can also be utilized as understock. These shouldn’t be used because they are considerably more challenging to work with than herbaceous roots.
Scion and rootstock should be cut at a complementary angle. Make sure your cuts are made on a level surface to ensure optimum contact. The goal is to align the cambium layers of the herbaceous understock and tree peony scion. Growth takes place in the cambium layer, which is made up of the undifferentiated vascular system cells of the plant. The vascular cambia of the scion and rootstock develop together in a successful graft.
Don’t waste time adjusting the scion and rootstock to fit perfectly. According to the Chinese, excessive rubbing of the cut surfaces reduces the likelihood of graft taking. Before attempting grafts for the first time, it is preferable to practice making precise, clean cuts.
Even highly successful commercial tree peony grafting processes occasionally fail. In our first year, over 70% of our grafts emerged in the spring; last year, that number was lower, but it was because we started too early in the summer. Hopefully, we’ll succeed between 80 and 90 percent of the time this year.
Use a rubber band to secure. Although a standard office rubber band will work just fine, we prefer to utilize grafting-specific rubber bands.
The majority of tree peony grafting videos instruct you to use grafting tape or polyfilm to cover the rubber band and wound region before allowing them to recover. We do not believe that this step is required since we heal the grafts more quickly at high heat than we would at room temperature.
Your grafts must heal after you have tied them up. We’ve discovered that doing this for a little period of time at a high heat works well. In a 4-deep tray, arrange the grafts, then fill the bottom with fresh, somewhat damp sand. The grafts won’t hold if the sand is too damp. Put at least 1 of moist sand over the grafts.
For six to seven days, keep the grafts covered in sand at 70 degrees. We carry out this using a heat mat. By intermittently spraying the top and covering with a piece of plastic, you can keep the sand moist. Grafts may not succeed if the media is too wet or too dry.
The grafts will have “taken” and the healing process will have started after six days. We have discovered that there is a good chance the graft was successful if the tree peony buds are still solid.
Choose a planting place with deep, well-drained soil (pH of at least 6.5) and roughly 6 hours of sun exposure.
Grafts should be planted 8 spaced apart in one row, with the top bud being 2-3 inches below the earth.
To assist keep moisture in the soil, add a thin layer of straw or leaves as a mulch. Cover your graft bed with a layer of clear plastic just before or after the ground freezes in the late fall, and then add more mulch on top of this. This occurs in November.
When the crocuses blossom or in the middle to late March, uncover your grafts by removing all mulch. At this point, the tender branches ought to be emerging from the ground.
First-year grafts should reach a height of 8–16. Although it is advisable to remove these early so that the plant does not expend energy on a little flower, some may even develop viable flower buds. Later in the spring, when the leaves have fully greened, start fertilizing.
The size of the scion and understock, planting conditions, and the relative vigor of a particular variety are just a few of the variables that might affect how much growth occurs in the first year.
You might wish to space out your grafts even further in the fall of the first year. 2. Discard the rubber bands. Replant the graft deeper, at least 4 above the graft union, if it has not yet produced any tree peony roots.
Grafted tree peonies that are not buried sufficiently frequently never form tree peony roots and fail to flourish.
- Sharp grafting knife or straight-edge razors
- incisive gardening shears
- alcohol isopropyl (to sterilize cutting instruments)
- Toilet paper
- ties made of hemp or rubber (specialty grafting rubber bands are available from nursery supply companies, but plain old rubber bands will also do)
- roots of a herbaceous peony
- Peony tree scions (bud cuttings)
- a tray with clean, moist sand.
- warmth mat (not strictly required, if there are other means of keeping grafts at 70 degrees for the healing period)
The method outlined here can also be used to graft “Itoh” or intersectional hybrid tree peony.
We tried spring grafting of tree peony many years ago after a harsh winter with plenty of branch loss. Sadly, all but one of them failed, however there could have been a variety of causes for this. The root stock was also quite small, and the scions were taken from winter damage where they may have become dessicated. The optimal time to transplant is in the fall, to summarize.
How are peony trees cultivated?
Plant the peony seeds similarly to how you would beans. Add a marker label to the region to identify its boundaries. The majority of seeds ought to sprout in the upcoming spring and summer. Early fall outdoor planting gives the seeds their required warm, moist therapy, followed by the cold treatment of winter and the warming of spring.
Can peony cuttings be rooted in water?
No, the fragments in water won’t grow roots; they will instead perish. For herbaceous peonies, the tuberous roots are the only part I am aware of that can grow from root divisions. I believe that all tree peonies are grafted or rooted cuttings. But they don’t simply have roots in the winter; they also have woody stems all year.
How are peonies grown from cuttings?
Herbaceous peonies need to be severely pruned back to the ground in the fall. Pruning is unnecessary for tree peony. In the fall, all that is required is the removal of the faded seed heads. In the autumn, resist the urge to remove the withered leaves; instead, let it fall off naturally. Tree peony should not be severely pruned because they are sometimes grafted onto herbaceous peonies.
Try to avoid walking on the herbaceous types’ newly emerging buds when weeding borders.
Peonies occasionally develop suckers at the plant’s base. David Hurrion discusses what to do with them in this passage:
How to propagate peonies
Herbaceous peonies can be multiplied in the fall through division. Lift the plant with a garden fork after trimming back the wilted foliage. Cut off pieces of the crown with a knife after removing as much of the garden soil as you can. There should be plenty of root in each part and at least three buds. Replant as soon as possible in the garden.
Try not to split tree peonies. Alternatively, you might be able to attempt sowing seed or stacking a flexible stem.
Growing peonies: problem solving
Ants are drawn to the peony buds. It’s common to witness ants swarming around the buds. They won’t harm the plant, so don’t be concerned.
Peony wilt is by far the most prevalent issue. The stems decay as a result of this botrytis. Planting peonies too closely together is best avoided. Remove any leaves with dark spots on them to help stop the fungus from spreading. To prevent reinfection in spring, remove all the foliage before trimming back herbaceous plants in the fall.
In this Gardeners’ World video clip, Carol Klein provides a practical guide on identifying and treating peony wilt as well as advice on how to clean secateurs to prevent reinfection:
A tree peony should I deadhead?
Paeonia suffruticosa, often known as tree peonies, are robust, deciduous shrubs that bloom each spring with hundreds of enormous, exotic flowers. Peonies that are herbaceous perennials that die back to the ground every year should not be confused with these.
Tree peony are gorgeous and long-lived, and their only real care requirement is deadheading. Here’s how to prune your mature shrub correctly if it ever outgrows its space or becomes lanky and unproductive.
What distinguishes a peony from a tree peony?
Perennial peonies called herbaceous peonies fade back to the ground every year. The plant stems push up in the spring while the roots remain dormant beneath the dirt. Woody, deciduous shrub peonies are called tree peony. They shed their foliage in the fall, but unlike herbaceous peony, their woody branches do not die back to the ground. Itoh peonies are a hybrid cross between herbaceous and tree peonies; while they do die down to the ground in the fall like herbaceous peonies, they exhibit tree peony-like growth and flowering traits.
Before they became beloved ornamentals, tree peony, which are native to China, were prized as a therapeutic plant. A tree peony can reach a height and width of up to five feet (1.5 meters) in around ten years and is a larger, woodier relative of the ordinary herbaceous peony. They are widely coveted for their huge, prodigious blooms, which can reach a diameter of up to 10 inches (25+ cm).
These blooms occur in single or double shapes and bloom from late spring to early summer. They are great cut flowers. Tree peony do not produce the sweet honeydew sap that herbaceous peonies do, which is what draws ants to their flower buds.