It blooms in spring and sometimes again later in the summer.
Its flower form can be single or double.
Although it belongs to theRosaceaefamily, it is in a different genus than common garden roses.
The Spruce / Evgeniya Vlasova
Japanese rose is among the rare flowering shrubs that bloom well in full to partial shade.
In addition to attractive yellow flowers, the bark and branches are also interesting.
Smaller branches radiate off the main branches in all directions.
The Spruce / Evgeniya Vlasova
The branching pattern thus affords interest both vertically and horizontally; it is also relatively airy.
The bark is a pleasing kelly green to greenish-yellowa color retained throughout the winter.
Japanese rose is generally planted as a nursery-grown potted specimen in spring or fall.
The Spruce / Evgeniya Vlasova
It grows relatively fast, achieving its full size in the first year after planting a container-grown specimen.
Flowers fade if the plant is located in an area that receives full sun.
Dense soils can cause root rot in this plant.
The Spruce / Evgeniya Vlasova
Light
Grow this bush in partial to full shade for best flower production.
It is one of the most shade-tolerant deciduous flowering shrubs.
Too much bright sunlight causes the flower color to fade quickly.
Soil
Japanese rose prefers loamy soil and is not overly fussy aboutsoil pH.
Avoid planting it in heavy clay soil.
It will tolerate poor soils but will perform better in soils enriched with organic material.
The soil should be kept evenly moist, but it doesn’t like soggy conditions.
Lightly mulching will help conserve soil moisture.
This shrub has a good tolerance for short periods of drought.
In the southern part of the range, it will appreciate deeper shade.
Fertilizer
Fertilize Japanese rose shrubs lightly in spring with aslow-release fertilizer.
Spreading a layer of compost or organic mulch around the plant will also provide nutrition to the plant.
Prune out dead branches as you find them.
Older plants in need of rejuvenation can be cut down to ground level.
Japanese rose spreads by suckering; remove these suckers as they appear if you wish to control their spread.
Propagating Japanese Rose
This shrub is best propagated byrooting softwood cuttings.
Make the cut just below a leaf node.
Trim away all the leaves from the bottom half of the cutting.
Dip the end of the cutting in rooting hormone.
Mist the cutting daily.
Roots should begin to develop in four to six weeks.
Expect only about 20 to 30% of the seeds to sprout.
Those that do will sprout in two to three weeks.
Most experts recommend a pot of at least 15 inches in diameter.
When moving the rose, take care not to touch the roots, as this can damage them.
Japanese rose can be grown in pots for a few seasons until large enough to plant outside.
Dried tree leaves about 1 foot deep are also a great option.
Straw will work as well.
This plant has no serious pest enemies.
check that your soil has a balanced nutrient content that isn’t too high in nitrogen.
The second reason could be because of pruning at the wrong time.
This plant can easily live for 10 to 15 years before becoming spindly and producing fewer blooms.
At that point, you might be able to cut it back severely to rejuvenate it.
Japanese Kerria.Home & Garden Information Center | Clemson University, South Carolina, 1 Feb. 2021, https://hgic.clemson.edu/factsheet/japanese-kerria/
