fernN. America Native

Intermediate Wood Fern

The Story

Plant Bio

Dryopteris intermedia is an arching, clumping herbaceous fern that forms vase-shaped crowns between eighteen and thirty-six inches tall. Its finely dissected fronds remain rich green into winter in mild climates and unfurl fresh fiddleheads in mid-spring.

Microscopic, gland-tipped hairs on the frond undersides and spore covers produce a subtle resinous scent when crushed. It is distinguished from similar native wood ferns by its lowest sub-leaflets being shorter than those adjacent to them along the stem.

Uses & Benefits:

Provides year-round lacy foliage texture and structure in shady garden beds.

Stabilizes shaded moist soil without aggressive rhizomatous spreading.

Provides cover and overwintering habitat for woodland ground insects and small wildlife.

Essentials

At a Glance

Plant Type

Fern

Height

36"

Width

36"

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Medium to wet

Humidity

High

Lifespan

Perennial

Native To

Eastern North America

Toxicity

Non-toxic

Planting

How to Grow

Select a planting site in partial to full shade with shelter from strong winds.
Amend the planting area with leaf mold or compost to ensure high organic content and moisture retention.
Set the crown level with the soil surface, ensuring it is not buried.
Water thoroughly after planting and apply a two-inch layer of organic mulch around the crown.

Pro Tip

Wait until late winter or early spring to trim back tattered foliage, as leaving old fronds intact helps insulate the central growing crown against frost heave.

Keep It Thriving

Care Guide

Do

Maintain consistent soil moisture throughout the warm summer months.
Mulch annually with leaf mold or compost to mimic natural forest floor conditions.
Cut spent or winter-damaged fronds back to the ground in late winter.

Don't

Do not allow the root zone to dry out completely during summer heat.
Do not bury the growing central crown during planting or mulching.
Avoid planting in exposed locations subject to high afternoon sun or severe winds.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Woodland GardenShade BorderMass PlantingNative Plant GardenRain Garden Edging

Companion Plants

Heuchera americana Asarum canadense Polystichum acrostichoides Actaea racemosa

Multiply

Propagation Methods

Good to Know

Common Questions

Intermediate Wood Fern questions

What zones can Intermediate Wood Fern grow in?

Intermediate Wood Fern is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Intermediate Wood Fern deer resistant?

Yes — Intermediate Wood Fern is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

Does Intermediate Wood Fern need full sun?

Intermediate Wood Fern does best in part shade.