Species

Cyrtomium fortuneiFortune's Holly Fern

5 other cultivars

fern

Giant Holly Fern

Cyrtomium fortunei 'Ulleung Island'

The Story

Plant Bio

Cyrtomium fortunei, known as Japanese holly fern, is an evergreen fern characterized by its dark green, pinnate fronds that form a dense, arching clump, thriving in shaded, moist environments.

The 'Ulleung Island' cultivar is distinguished by its compact growth habit and enhanced cold tolerance, making it well-suited for ornamental use in temperate gardens.

Uses & Benefits:

Provides lush, evergreen foliage that enhances shaded areas and adds texture to garden beds.

Drought-tolerant once established, reduces need for frequent watering.

Supports local insects and maintains soil stability in shaded landscapes.

SpeciesCyrtomium fortuneiFortune's Holly Fern

Essentials

At a Glance

Plant Type

Fern

Height

24"

Width

24"

Light

Partial Sun, Shade

Zones

5, 6, 7, 8, 9

Water

Moderate

Humidity

High

Lifespan

Perennial

Native To

East Asia

Toxicity

Non-toxic to humans and pets

Planting

How to Grow

Tuck spores or divisions into prepared soil in early spring
Water thoroughly after planting to settle soil
Mist regularly to maintain humidity 🌱
Provide consistent moisture and indirect light
Mulch around base to retain soil moisture
Divide every 3-4 years for vigorous growth

Pro Tip

Keep soil consistently moist and provide indirect light for best growth.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist
Mulch to conserve moisture 🌱
Divide in early spring for rejuvenation

Don't

Avoid direct sunlight which can scorch fronds ❌
Do not let soil dry out completely
Avoid heavy fertilization that can cause leaf burn

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Mulch
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shady woodland borderEvergreen privacy screenMoisture-loving garden bed

Companion Plants

Hosta Astilbe Acer palmatum Heuchera

Multiply

Propagation Methods

Good to Know

Common Questions

Giant Holly Fern questions

What zones can Giant Holly Fern grow in?

Giant Holly Fern is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Giant Holly Fern deer resistant?

Not reliably. Deer may browse Giant Holly Fern, especially tender spring growth — plan on repellents or fencing where pressure is high.

Does Giant Holly Fern need full sun?

Giant Holly Fern does best in part shade.