North America Native Plant

Mexican Scaly Cloakfern

Botanical name: Astrolepis sinuata mexicana

USDA symbol: ASSIM2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Mexican Scaly Cloakfern: A Drought-Tough Native for Water-Wise Gardens If you’re looking for a unique native plant that laughs in the face of drought, meet the Mexican scaly cloakfern (Astrolepis sinuata mexicana). This isn’t your grandmother’s shade-loving, moisture-craving fern. This tough little character has evolved to thrive in some of ...

Mexican Scaly Cloakfern: A Drought-Tough Native for Water-Wise Gardens

If you’re looking for a unique native plant that laughs in the face of drought, meet the Mexican scaly cloakfern (Astrolepis sinuata mexicana). This isn’t your grandmother’s shade-loving, moisture-craving fern. This tough little character has evolved to thrive in some of the harshest conditions the American Southwest can dish out.

What Makes This Fern Special?

The Mexican scaly cloakfern is a perennial fern that’s perfectly adapted to arid climates. Unlike most ferns that wilt at the first sign of dry weather, this species has developed an ingenious survival strategy. When water becomes scarce, its fronds curl up and appear almost dead, but give it a drink of water and watch it spring back to life like magic.

The scaly part of its name comes from the distinctive scales that cover the undersides of its fronds, giving them a silvery appearance that helps reflect heat and reduce water loss. It’s nature’s own built-in sun protection!

Where Does It Call Home?

This native beauty is naturally found in Texas and New Mexico, where it grows in rocky crevices and on cliff faces. It’s perfectly adapted to the challenging conditions of the southwestern United States, making it an authentic choice for regional native plant gardens.

Why Consider Growing Mexican Scaly Cloakfern?

Here are some compelling reasons to add this unique fern to your landscape:

  • Extremely drought tolerant once established
  • Requires minimal maintenance and care
  • Adds unique texture and interest to rock gardens
  • Native plant that supports local ecosystems
  • Thrives in challenging spots where other plants struggle
  • Provides year-round interest with its evergreen nature

Perfect Spots for This Desert Dweller

The Mexican scaly cloakfern is ideally suited for:

  • Rock gardens and xeriscapes
  • Desert-themed landscapes
  • Areas with poor, rocky soil
  • Spots that receive intense sun and heat
  • Water-wise garden designs
  • Native plant collections

Growing Conditions and Care

This fern is surprisingly easy to grow if you can resist the urge to pamper it. Here’s what it needs to thrive:

Hardiness: Suitable for USDA zones 7-10, making it perfect for much of the southern and southwestern United States.

Sunlight: Full sun to partial shade. Unlike most ferns, this species can handle intense sunlight.

Soil: Well-draining, rocky soil is essential. Clay or constantly moist soil will likely kill this plant. Think rocky, gravelly, or sandy conditions.

Water: Once established, water sparingly. This fern is built for drought and will actually suffer if kept too wet.

Planting and Care Tips

Getting your Mexican scaly cloakfern established doesn’t require a green thumb, just a light touch:

  • Plant in spring or fall for best establishment
  • Ensure excellent drainage – this cannot be overstated
  • Water regularly the first few months, then back off significantly
  • No fertilizer needed – this plant prefers lean conditions
  • Minimal pruning required; remove any dead fronds if desired
  • Mulch with gravel or small rocks rather than organic mulch

A Note on Wildlife Benefits

While ferns don’t produce flowers for pollinators, they do provide habitat structure for small wildlife and can serve as shelter for beneficial insects. The Mexican scaly cloakfern’s ability to survive in harsh conditions makes it a reliable presence in challenging habitats where other plants might fail.

Is This Fern Right for Your Garden?

The Mexican scaly cloakfern is perfect for gardeners who want to embrace water-wise gardening with native plants. It’s an excellent choice if you’re dealing with rocky soil, intense sun, or want to create a low-maintenance landscape that celebrates the beauty of arid-adapted plants.

However, if you’re looking for a lush, tropical-looking fern for a shady, moist spot, this isn’t your plant. Save this tough character for those challenging spots where you need something that can handle heat, drought, and poor soil with style.

By choosing native plants like the Mexican scaly cloakfern, you’re not just creating a unique garden – you’re supporting local ecosystems and celebrating the incredible diversity of plants that call your region home.

Mexican Scaly Cloakfern

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

Astrolepis Benham & Windham - cloakfern

Species

Astrolepis sinuata (Lag. ex Sw.) Benham & Windham - wavy scaly cloakfern

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