Adiantum x mairisii
fern RHS Award

Mairis's Maidenhair Fern

Adiantum x mairisii

$24.50

The Story

Plant Bio

Adiantum, the maidenhair fern genus, is characterized by its delicate, fan-shaped leaf segments (pinnules) on wiry, black stalks (stipes), creating a light, airy texture.

A deciduous garden hybrid, noted for being one of the hardiest and most adaptable maidenhair ferns. It forms a clump of arching fronds with fresh green, triangular pinnules on black stems.

Uses & Benefits:

Ornamental UsesAdiantum x mairisii provides delicate, lush foliage perfect for shaded gardens and indoor displays, adding texture and elegance.
Practical UsesIts ability to thrive in low-light, moist environments makes it ideal for indoor air purification and shaded outdoor areas.
Ecological BenefitsServes as a habitat for beneficial insects and contributes to biodiversity in shaded garden ecosystems.

Essentials

At a Glance

Plant Type

Fern

Height

15 inches

Width

18 inches

Light

Partial Sun, Shade

Zones

7, 8, 9, 10

Water

Keep soil moist

Humidity

High humidity preferred

Lifespan

Perennial

Native To

Garden Origin

Toxicity

Non-toxic to humans and pets

Bloom period

Late spring – Early summer

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In flower about 2 months of the year

Marketplace

Where to Buy

Dancing Oaks
Ships Year Round
<1 Gal Pot
In Stock$24.50

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

  1. Tuck spores or small plants into moist, well-draining soil in partial shade.
  2. Keep soil consistently moist but not waterlogged for lush growth.
  3. Mist fronds regularly to maintain humidity, especially indoors or in dry climates.
  4. Provide filtered sunlight or dappled shade for optimal health.
  5. Transplant in early spring after the last frost for best establishment.
  6. Mulch around the base to retain moisture and suppress weeds.

Pro Tip

Maintain high humidity and consistent moisture to keep fronds vibrant and healthy.

Keep It Thriving

Care Guide

Do

  • Water regularly to keep soil moist 🌱
  • Provide bright, indirect light for optimal growth
  • Mulch to retain soil moisture and reduce weeds
  • Prune dead or damaged fronds to encourage new growth

Don't

  • Avoid letting soil dry out completely ❌
  • Do not expose to direct, harsh sunlight which can scorch fronds
  • Avoid over-fertilizing, which can cause leggy growth
  • Do not let air circulate dry out the environment

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Divide
Mulch
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded woodland garden borderIndoor fern display with lush foliageMoist, shaded container garden

Companion Plants

Hostas Caladiums Ferns Begonias Anthuriums

Multiply

Propagation Methods

Good to Know

Common Questions

Mairis's Maidenhair Fern questions

What zones can Mairis's Maidenhair Fern grow in?

Mairis's Maidenhair Fern is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Mairis's Maidenhair Fern deer resistant?

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

When does Mairis's Maidenhair Fern bloom?

Mairis's Maidenhair Fern typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Mairis's Maidenhair Fern need full sun?

Mairis's Maidenhair Fern does best in part shade.

Keep exploring

Grow Mairis's Maidenhair Fern with confidence

See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.