Herbaceous and Tree Peonies

Do you have a chimera peony in your garden, at tree peony which also blooms as a herbaceous peony? In fact, this is not some rare mutation, but a rather common circumstance in which the the tree peony’s herbaceous peony understock, or rootstock has sprouted.

Tree peonies are most commonly reproduced by grafting. Briefly, this is a method of propagation in which a tree peony scion, or cutting, is fused to the root of herbaceous peony. This acts as a ‘battery’ to power the tree peony in its first few years of growth. I detailed this process in a post last year.

Ideally, by the time tree peonies leave the nursery, they will have grown their own roots. This is achieved by planting young tree peonies deeply to entourage the grafted scion to sprout its own roots. At Cricket Hill Garden, we strive to only send out grafted tree peonies which have also sprouted some of their own roots and also mark the correct planting depth on each tree peony we ship. Many of our tree peonies are propagated by division and are on their own root. o not plant young grafted tree peonies deeply enough, nor do they give customers proper instructions for planting.

If a tree peony is planted too shallowly, the plant is unable to form its own roots. This can lead to both sprouted understock as well as overall plant weakness.

If left unattended, sprouted herbaceous peony understock on a tree peony will gradually sap the strength from the tree peony, to the point where it will eventually be overcome and killed out by the herbaceous peony. To avoid this the herbaceous rootstock must either be cut away below the soil line in spring or separated from the tree peony at the root in the fall. The tree peony is more rare and valuable and therefore is the plant to save. The simplest thing to do is cut back the herbaceous peony foliage BELOW the soil line and then mound up 6” of soil around the base of the tree peony. This can be done at anytime, and will discourage the herbaceous peony from re-sprouting as well as encourage the tree peony to form its own roots.

If you do want to save the herbaceous peony and plant it out in another part of your garden, wait until the fall to do this. In a few months, when it’s time to dig and divide peonies I will do a follow up post which will illustrate dividing a herbaceous understock from a tree peony.


Tlmbr Pr2005 Gardener`s Peony Herbaceous And Tree Peonies [HC,2005]
Book (Tlmbr Pr2005)

Peony farm in San Jose

2006-06-06 13:38:33 by 4peonies

If you live in the bay area, I grow over 120 varieties of herbaceous and tree peonies and they can be purchased in 5 gallon containers all year round at the farm. The roots are 2-4 years old. They can also be mail ordered if out of the bay area and shipped in the fall. Visit my web site 4irises.com and see the varieties that I grow. Visitors are always welcome and the peonies are in full bloom right now.


Peonies in pots

2006-06-06 13:30:48 by 4peonies

Peonies can very well be planted in pots but do need full sun except tree peonies that could do with part sun. Peonies can bloom in the bay area very well if planted with the top eyes at the surface level. The main reason that peonies fail to bloom is that they are planted too deeply. I grow over 120 varieties of tree and herbaceous peonies in San Jose. I sell them with at least 5 eyes in 5 gallon containers all year round. See my web site 4irises.com


Peonies from Costco?

2005-01-15 20:53:46 by greedynot

I have not been able to get herbaceous peonies to bloom. Its just not cold enough in much of the area. Where are you in the Bay Area? This is an exceptionally cold year and I am hoping again! You can try the tree peony or herbceous peonies with blooms on them in the spring. But I doubt if you can get the herbaceous ones to bloom the following year though.
Btw, its good to plant the dormant plants and allow the roots to grow before the top does. Maybe March would be a good time. But don't plant if its too wet.


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Planting Herbaceous Peonies
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Book (American Horticultural Society,, Washington:)

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