North America Native Plant

Largeleaf Maidenhair

Botanical name: Adiantum macrophyllum

USDA symbol: ADMA

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Largeleaf Maidenhair: A Tropical Native Fern for Shaded Gardens If you’re looking to add some delicate, tropical charm to your shaded garden spaces, the largeleaf maidenhair (Adiantum macrophyllum) might just be the perfect native plant for you. This enchanting fern brings an airy, almost magical quality to any landscape with ...

Largeleaf Maidenhair: A Tropical Native Fern for Shaded Gardens

If you’re looking to add some delicate, tropical charm to your shaded garden spaces, the largeleaf maidenhair (Adiantum macrophyllum) might just be the perfect native plant for you. This enchanting fern brings an airy, almost magical quality to any landscape with its distinctive fan-shaped fronds that seem to dance in the slightest breeze.

What Makes Largeleaf Maidenhair Special?

Native to Puerto Rico, this perennial fern stands out from its maidenhair cousins with larger, more substantial fronds that create beautiful textural interest in the garden. The bright green foliage has that classic maidenhair appearance – delicate and feathery – but with a bolder presence that makes it easier to spot and appreciate in your landscape design.

Where Does It Naturally Grow?

Largeleaf maidenhair is exclusively native to Puerto Rico, where it thrives in the island’s naturally humid, tropical environment. This limited geographic distribution makes it a special choice for gardeners in similar climates who want to grow truly local native plants.

Why Choose This Native Fern?

There are several compelling reasons to consider adding largeleaf maidenhair to your garden:

  • Native plant benefits: Supporting local ecosystems by choosing plants that naturally belong in your region
  • Unique aesthetic appeal: Adds tropical elegance and soft texture to shaded areas
  • Low maintenance: Once established in the right conditions, native plants typically require less intensive care
  • Wetland adaptability: Can handle both wetland and non-wetland conditions, making it versatile for different garden situations

Perfect Garden Settings

This fern shines in tropical and subtropical shade gardens where it can serve as an understory accent plant. It’s particularly well-suited for:

  • Naturalistic tropical landscapes
  • Shaded borders and woodland gardens
  • Areas with consistent moisture
  • Spots that need soft, textural interest

Growing Conditions and Care

Success with largeleaf maidenhair comes down to mimicking its natural Puerto Rican habitat:

  • Light: Partial to full shade – direct sunlight can scorch the delicate fronds
  • Moisture: Consistent moisture is key, but ensure good drainage to prevent root rot
  • Humidity: High humidity levels are essential for healthy growth
  • Hardiness: Suitable for USDA zones 10-11 only

Planting and Care Tips

Getting your largeleaf maidenhair established successfully requires attention to a few key details:

  • Plant in rich, well-draining soil that retains moisture
  • Provide protection from strong winds that can damage delicate fronds
  • Maintain consistent moisture without waterlogging
  • Consider misting regularly if your area lacks natural humidity
  • Remove any brown or damaged fronds to encourage new growth

A Note About Wildlife Benefits

As a fern, largeleaf maidenhair doesn’t produce flowers or nectar that would attract pollinators like bees and butterflies. However, it can provide habitat and shelter for small creatures and adds to the overall biodiversity of your native plant garden.

Is This Fern Right for You?

Largeleaf maidenhair is an excellent choice if you garden in tropical zones 10-11 and have shaded areas that could benefit from elegant, native plant interest. Its beauty lies in its simplicity and the way it adds movement and softness to the landscape. Just remember that this is a plant that truly needs its tropical conditions – it won’t tolerate cold temperatures or dry conditions well.

For gardeners outside of Puerto Rico or similar tropical climates, you might consider other native Adiantum species that are better suited to your local conditions. The key is always choosing plants that will thrive naturally in your specific environment.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Caribbean

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Largeleaf Maidenhair

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Pteridaceae E.D.M. Kirchn. - Maidenhair Fern family

Genus

Adiantum L. - maidenhair fern

Species

Adiantum macrophyllum Sw. - largeleaf maidenhair

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA