Rhodotypos scandens aka Jetbead

Taxonomy ID: 2805

Rhodotypos scandens is a deciduous shrub in the rose family. Gardeners know it as jetbead or white kerria. It grows wild in China, Korea, and Japan. It is the sole species in its genus. Growers brought it to the United States in 1866. It now grows beyond gardens in many eastern states. Its fast growth can crowd out native forest plants.

In gardens, it reaches 3–6 feet (0.9–1.8 metres) tall. Its spread can reach 4–9 feet (1.2–2.7 metres). RHS gives a smaller upper size of about 5 feet (1.5 metres) each way. Oregon State notes that some plants exceed 6 feet (1.8 metres). Many stems form a loose mound with arching branches. Suckers help it spread and can leave it looking untidy. Thin, smooth bark has a light gray tone. Green or brown stems may turn red with age.

Bright green leaves grow in pairs along the stems. Each simple, oval leaf ends in a long point. The edges have two sets of sharp teeth. Deep veins give the upper surface a puckered look. Fine yellow hairs cover the undersides of the leaves. Fall brings a pale yellow tint rather than bold color. White flowers open at shoot tips from May to June. Each flower has four petals and stands on its own. Small drupes follow in groups of three or four. They change from red to glossy black by October. The fruits stay on the shrub through winter. Four spreading sepals remain beneath each fruit cluster.

It grows in sun or part shade, and tolerates shade. Moist, well-drained soil with moderate fertility suits it well. It accepts clay and a broad range of soil pH. It also withstands drought, pollution, and tough urban sites. Sources place it in USDA zones 4–8 and RHS rating H5. Garden uses include hedges, shrub borders, and woodland gardens. Flowers and lasting fruits provide interest across several seasons. Yet its spread limits its value near natural areas. North Carolina's Invasive Plant Council lists the species as invasive.

Sources report few major problems from insects or disease. Rapid growth and suckers pose a greater concern for gardeners. The fruit is poisonous, not a food for people or pets. It contains amygdalin, a compound that can release cyanide. Eating it can cause vomiting, weakness, and trouble breathing. Severe poisoning can lead to convulsions, coma, or death.

Common names

Jetbead, White Kerria, Black Jetbead, Black Jet Bead

More information about Jetbead

How easy is Rhodotypos scandens to care for?

Rhodotypos scandens is an extremely easy-care shrub that thrives on neglect. It tolerates drought, pollution, urban conditions, poor soils, soil compaction, and can grow in full sun to deep shade. The plant is generally pest-free and disease-free, making it ideal for low-maintenance gardens. However, gardeners should be aware of its invasive potential in eastern North America.

How big does Rhodotypos scandens grow?

⚡ Fast

Rhodotypos scandens is a fast-growing deciduous shrub that typically reaches 3-6 feet (1-2m) tall with a spread of 4-9 feet (1.2-2.7m). It has a loosely multi-branched, mounded to somewhat arching form. The shrub reaches its full size in 5-10 years. Its spreading habit can appear untidy if not pruned regularly.

Where is Rhodotypos scandens native to?

Rhodotypos scandens is native to East Asia, specifically China (including Anhui, Gansu, Henan, Hubei, Jiangsu, Liaoning, Shaanxi, Shandong, and Zhejiang provinces), Japan, South Korea, and Manchuria. In its native habitat, it grows in forests on mountain slopes at elevations of 100-800 meters. It was introduced to the United States from Asia in 1866.

What temperatures can Rhodotypos scandens tolerate?

Rhodotypos scandens is a cold-hardy shrub suitable for USDA zones 4-8, tolerating winter temperatures down to -30°F (-34°C). In the UK, it carries an RHS H5 hardiness rating, meaning it survives severe winters throughout most of Britain. The plant is deciduous and loses its leaves in autumn, entering dormancy during winter.

How should I prune Rhodotypos scandens?

Prune Rhodotypos scandens in mid-winter or immediately after flowering in early summer. Remove old, woody shoots to maintain vigour and encourage new growth from the base. The shrub tolerates heavy pruning and shearing well. RHS classifies it under pruning groups 1 or 2, meaning minimal pruning is needed, but renovation pruning can rejuvenate overgrown specimens.

How do I propagate Rhodotypos scandens?

Rhodotypos scandens can be propagated by cuttings or seeds. For cuttings, take semi-ripe cuttings in late summer or hardwood cuttings in winter, dip in rooting hormone, and plant in well-draining soil mix. Seeds require stratification: warm stratification at 25-30°C for 30 days followed by cold stratification at 5°C for 90 days. Alternatively, sow seeds in containers in a cold frame outdoors.

When and how does Rhodotypos scandens flower?

🌸 May-June

Rhodotypos scandens produces attractive white flowers from late spring to early summer (May-June). The blooms are 3-5cm (1.5-2 inches) across with four white petals and 30-60 stamens, appearing at the tips of shoots. The flowers are followed by distinctive shiny black bead-like drupes that persist through winter, giving the plant ornamental interest across multiple seasons.

What pests and diseases affect Rhodotypos scandens?

Rhodotypos scandens is remarkably resistant to pests and diseases. NC State Extension reports no serious pest or disease problems, and RHS describes it as generally pest-free and disease-free. Interestingly, deer avoid this plant, likely due to its toxic properties, making it a good choice for gardens with deer pressure.

Can Rhodotypos scandens be grown outdoors?

🇺🇸 USDA 4-8 🇬🇧 UK Zone 5

Rhodotypos scandens is exclusively an outdoor shrub, hardy in USDA zones 4-8 and RHS H5. It thrives in a wide range of conditions from full sun to deep shade and tolerates urban pollution, drought, and various soil types. It's suitable for borders, woodland gardens, and hedging.

Does Rhodotypos scandens need special seasonal care?

Rhodotypos scandens is deciduous and requires minimal seasonal attention. In autumn, the leaves turn yellow before dropping, while the glossy black berries persist through winter. No special winter protection is needed in zones 4-8. Prune in mid-winter or after spring flowering. The plant's drought tolerance means reduced watering needs once established, though consistent moisture promotes better flowering.

What are the water needs for Jetbead

💧 Dry to moist
Jetbead should be watered regularly, allowing the soil to dry out between waterings.

What is the right soil for Jetbead

pH: Adaptable Any soil
Jetbead loves a well-draining soil. Perlite and vermiculite help with drainage, while coco coir adds organic matter, so a good potting soil mix will have all three. You can improve store-bought soil by adding some perlite to it.

What is the sunlight requirement for Jetbead

To ensure optimal growth, the Jetbead prefers bright indirect light for 6-8 hours each day. Insufficient light can result in slow growth and leaf drop, so it's important to find a well-lit location for this plant. Place it near a window, within a distance of 1 meter (3 feet), to enhance its potential for thriving.

Is Jetbead toxic to humans/pets?

Jetbead is poisonous if ingested. We suggest keeping this plant out of reach if you have children, cats, or dogs in the home.

More info:
Wikipedia • GBIF

Sources

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