The lovely Japanese peonies

Paeonia Heidi. a lovely, floriferous, pink Japanese peony in my garden

The lovely Japanese peonies are not defined by their place of origin, but by a fascinating floral transformation. The term “Japanese” refers to a flower form that became widely known to Western gardeners through plants and illustrations from Japan in the late 19th and early 20th centuries, not to the regions where the cultivars were originally bred.

In these flowers, fertile stamens, either partially or entirely, lose their pollen-bearing function and are transformed into staminodes. The petaloid structures form a delicate, sculptural center, as seen on ‘Charm’ illustrated here.

This evolution gives rise to blooms that are lighter, airier, and often strikingly graphic, where the contrast between broad guard petals and the refined inner crown becomes the true focus of beauty.

Paeonia Charm, a peony flower of Japanese form

Paeonia Show Girl, a Japanese anemone peony

In more advanced expressions of this transformation, the flower approaches the anemone form as defined by the American Peony Society. The stamens of this form are further developed into fully petaloid structures that closely mimic true petals. Form, texture, and contrast take center stage in these elegant blooms. ‘Show Girl’ is a common example of an anemone peony. See also in the gallery ‘Gay Paree’.

Fertile or not?

As I was working on this post, I caught myself wondering whether Japanese-type peonies might be infertile, since their stamens are so dramatically transformed. In reality, many of them remain at least partially fertile: some stamens can still produce pollen, and the pistils are mostly fully functional, allowing the flowers to set seed.

Blooming period

Japanese-type peonies generally bloom from mid- to late season, extending the peony display once most early single and semi-double forms have faded. Their timing makes them especially valuable for maintaining interest and continuity in the garden as the season progresses.

Below is a gallery of the lovely Japanese-type peonies, including some anemones, from my peony garden.

Japanese peonies, not only for the garden

Japanese peonies are also beautiful in floral arrangements. Although some consider them shorter-lived than fully double peonies, their refined form and sculptural centers more than compensate for their slightly briefer vase life. You may see some beautiful red Japanese peonies in the arrangement below.