Kerria of Japan – Kerria japonica – Kerria japonica – Garden plants – Kerria of Japan – Kerria japonica – Shrubs

To the genus Kerria belongs only the japonica species, native to Asia; it is a medium sized shrub, which reaches the 200-250 cm of height, with rounded shape.

The stems of the japonica kerria are thin, arched, poorly branched, each plant produces numerous basal buds, which tend to develop fairly quickly.

The foliage is deciduous, small, dark green; the leaves have a serrated or indented edge.

In spring, from March to May, it produces countless small golden yellow flowers, with five petals, similar to small yellow roses.

On the market you can find numerous cultivars, the most common is K. j. pleniflora, with double flowers, similar to small pompoms; there are also cultivars with white flowers, or with delicately variegated foliage.

Usually the spring flowering is very abundant, followed by a second flowering at the end of the summer, with production of a few scattered buds.

This plant is very common in the gardens of the past, especially in the case of the variety Pleniflora, now seems to be enjoying a second youth, although in recent years are spreading particularly the varieties with simple flowers.



Kerria Japanese kerries tolerate any exposure, from full shade to full sun. Usually the plants placed in total shade tend to produce few flowers, while the buds of the specimens in full sun are short-lived and tend to whiten with exposure to sunlight.

The kerria japonica is a shrub definitely suitable for the half-shade, where its flowering is abundant and long lasting and the development of the plant quite vigorous.

These plants bloom on the branches of the previous year, so we recommend pruning after flowering in the spring.

  • piante da giardino In this section we talk about shrubs, a collection of detailed information about the different species grown in our gardens, tips for the right choice according to the needs of your ally…
  • Mimosa The mimosa (acacia dealbata) is a tree native to Tasmania, but that, arrived in our country in the mid 1800s, has adapted well to the climate of the Ligurian Riviera and that of the regions of…

  • Corbezzolo Evergreen tree or shrub native to Ireland and countries bordering the Mediterranean, which can reach 9-10 meters high, but which most commonly remains around the size of a tree or shrub.
  • Cornus alba This shrub has deciduous leaves native to central-southern Asia, which reaches 150-200 cm high. The thin stems have erect posture, branch off abundantly with the pass….


kerria japonica Usually the kerries of Japan are not very demanding as far as the water requirements are concerned; if the climate is favourable they tend to be satisfied with the rains; let’s avoid that the soil remains dry for very long periods in spring and autumn.

In February it is advisable to add to the soil at the foot of the shrub well mature organic fertilizer.


kerria japonica pleniflora This japonica variety prefers medium-textured, fairly deep and rich soils, which are very well drained. Avoid planting this plant in a place with water stagnation or with very heavy and poor soil.


In autumn, or at the end of winter, separate the new stems that form at the base of the mother plant. Cuttings, 10-15 cm long, can also be made, taking them in summer from the lateral branches and planting them in a cold case without need of protection. Always in summer, it is also possible to realize the layering which, without much difficulty, will root in a short time.

Kerria of Japan – Kerria japonica: Parasites and diseases

kerria japonica Particularly dangerous for the kerries of Japan are the fungi of the genus Cylindrosporium, which attack the shoots and lead to the drying up of the leaves. The best thing to do is to cut off both the tips and the diseased leaves. In addition to this, there are currently sporadic Blumeriella infections.

Between insects, caterpillars can attack roots and cause serious damage.

Mimosa - Acacia dealbata

Corbezzolo - Arbutus

Photinia x fraseri