Japanese barberry.

At a glance

Care level

Easy

Plant type

Deciduous shrub

Light

Full sun to partial shade

Indoor light

Direct sun

Water

Every 7 to 14 days

Mature size

3 to 6 feet

Growth rate

Medium

Hardiness

USDA 4 to 8

Bloom time

Mid to late spring

Care

Plant this shrub in a spot with plenty of sun to keep the leaf color vibrant. Watch for signs of powdery mildew if the air circulation is poor. Prune it back after flowering to maintain your desired shape.

Watering

Water deeply once established, but let the soil dry out slightly between sessions.

Feeding

Apply a balanced slow release fertilizer once in early spring.

Pruning

Trim back in late spring or early summer after the flowers fade.

Repotting

If kept in a container, move to a larger pot every few years when roots become crowded.

Soil

Well draining soil

Soil pH

Acidic to neutral

Temperature

-30 to 35°C

Humidity

30 to 70%

Drought tolerance

High

Lifespan

Perennial, typically 20 to 50 years.

Deer and rabbits

High

Safety

People

The stems and roots contain berberine, which can cause irritation if handled or ingested in large quantities.

Pets

This plant is considered mildly toxic to cats and dogs if ingested.

Children

The sharp thorns pose a significant risk of injury to children, so keep this plant away from play areas.

Contact allergens

The sharp spines can cause mechanical skin irritation and minor puncture wounds.

Airborne allergens

The pollen may cause mild seasonal allergy symptoms in sensitive individuals.

Edibility

The berries are generally considered non-toxic to birds but are not recommended for human consumption due to potential digestive upset.

How to identify it

• Small, oval shaped leaves
• Sharp spines along stems
• Small yellow spring flowers
• Bright red autumn berries

Height

0.6 to 2m

Spread

0.6 to 2m

Leaves

green, red, purple, yellow, deciduous

Flowers

yellow, 0.5 to 1cm

Fruit

red, Autumn

Problems to watch for

• AphidsCommon
• RustCommon
• Leaf SpotUncommon
• Powdery MildewUncommon
• AnthracnoseRare
• Verticillium WiltRare

Growing it

Propagation

cuttings, seed

When to plant

spring, autumn

Overwintering

This plant is very hardy and requires no special protection during winter. Simply clear away any fallen debris around the base in late autumn.

In containers

It grows well in large containers, but ensure the pot has excellent drainage and is at least 40 cm wide.

Plant in groups to create a dense, impenetrable hedge that serves as a natural security barrier.

Grows well with

• Coneflower · They share similar sun and soil requirements.
• Daylily · These provide a nice color contrast to the dark foliage of barberry.

Similar species

• Common Barberry · It is a related species that is also considered invasive in many areas.

Science

Family

Berberidaceae

Genus

Berberis

Order

Ranunculales

Class

Magnoliopsida

Native range

Japan and eastern Asia.

Conservation

It is listed as an invasive species in many states and should not be planted in areas where it can escape into the wild.

It thrives in forest edges and disturbed areas where it can quickly establish dense thickets.

Value to wildlife

nectar source, provides nesting cover

Pollinators

bees, butterflies

Uses

hedging, security barrier, ornamental shrub, erosion control

Taxonomy resolved against GBIF.

Questions people ask

Is this plant invasive?

Yes, it spreads easily by seed and is considered invasive in many regions.

How do I prune it?

Wear heavy gloves to protect against thorns and prune in late winter or after flowering.

Where the name comes from

The genus name Berberis comes from the Arabic word for the fruit, while the specific epithet thunbergii honors the Swedish botanist Carl Peter Thunberg.

Good to know

• It was introduced to North America from Japan in the late 1800s.
• The wood is sometimes used to create a yellow dye.
• It is incredibly tough and tolerates a wide range of soil conditions.

Also in

• Plants toxic to cats and dogs
• Drought-tolerant plants
• Deer-resistant plants