Species

fernN. America Native

Okanum fern

The Story

Plant Bio

Athyrium otophorum 'Okanum' is a deciduous fern characterized by its attractive, tongue-shaped fronds that offer a lacy texture in shady garden areas.

This cultivar is noted for its unique coloration and form, setting it apart from other ferns.

Uses & Benefits:

Provides lush, finely textured foliage that enhances shaded garden beds and borders.

Helps retain moisture in shady areas and prevents soil erosion.

Supports native pollinators and improves soil health.

SpeciesAthyrium otophorumEared Lady Fern

Essentials

At a Glance

Plant Type

Fern

Height

18 inches

Width

24 inches

Light

Partial Sun, Shade

Zones

5, 6, 7, 8

Water

Requires consistent moisture

Humidity

Prefers high humidity

Lifespan

Perennial

Native To

Asia

Toxicity

Non-toxic to humans and pets

Bloom period

Early summer – Mid-summer

In flower about 2 months of the year

Planting

How to Grow

Tuck spores or divisions into moist, well-draining soil in early spring.
Mist the foliage regularly to maintain humidity levels.
Keep soil consistently moist but not waterlogged during the growing season.
Provide partial shade to protect from harsh direct sunlight.
Mulch around the base to retain moisture and suppress weeds.
Transplant in early spring or fall for best results.

Pro Tip

Use organic compost to enrich soil and promote lush foliage growth.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil evenly moist 💧
Place in partial shade for optimal growth 🌿
Mulch to conserve moisture and regulate soil temperature
Feed with a balanced liquid fertilizer monthly during growing season

Don't

Avoid overwatering to prevent root rot ❌
Do not expose to direct, harsh sunlight
Refrain from disturbing roots during active growth
Avoid using chemical pesticides; opt for organic methods

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Lush shaded borderFern-filled woodland gardenTextured groundcover in shady areas

Companion Plants

Hosta Astilbe TrilliumSolomon's Seal Japanese Forest Grass

Multiply

Propagation Methods

Good to Know

Common Questions

Okanum fern questions

What zones can Okanum fern grow in?

Okanum fern is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Okanum fern deer resistant?

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

When does Okanum fern bloom?

Okanum fern typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Okanum fern need full sun?

Okanum fern does best in part shade.