North America Non-native Plant

Diamondleaf Lacefern

Botanical name: Ctenitis hirta var. hirta

USDA symbol: CTHIH2

Native status: Not native but doesn't reproduce and persist in the wild

Synonyms: Dryopteris hirta (Sw.) Kuntze (DRHI5)  ⚘  Thelypteris hirta (Sw.) Copeland (THHI5)   

Discovering the Diamondleaf Lacefern: A Tropical Beauty for Shaded Gardens If you’re searching for an elegant fern to add some tropical flair to your shaded garden spaces, the diamondleaf lacefern might just be the perfect green companion you’ve been looking for. This charming fern, scientifically known as Ctenitis hirta var. ...

Discovering the Diamondleaf Lacefern: A Tropical Beauty for Shaded Gardens

If you’re searching for an elegant fern to add some tropical flair to your shaded garden spaces, the diamondleaf lacefern might just be the perfect green companion you’ve been looking for. This charming fern, scientifically known as Ctenitis hirta var. hirta, brings a delicate, lacy texture that can transform any dim corner into a lush, woodland paradise.

What Makes This Fern Special?

The diamondleaf lacefern gets its common name from the distinctive diamond-shaped leaflets that grace its fronds. These delicate, finely-divided leaves create an almost ethereal appearance that’s hard to resist. Unlike the bold, architectural look of some ferns, this beauty offers a softer, more refined presence that whispers rather than shouts in the garden.

You might also encounter this fern listed under its older scientific names, including Dryopteris hirta or Thelypteris hirta, but don’t let the name variations confuse you – they’re all referring to the same lovely plant.

Where Does It Call Home?

This tropical native hails from the warm regions of the Americas, including Florida, the Caribbean, Central America, and parts of South America. In these humid, forested environments, it thrives in the dappled light beneath larger trees and shrubs.

Is the Diamondleaf Lacefern Right for Your Garden?

Before you fall head over heels for this fern, let’s talk about whether it’s a good match for your garden. The diamondleaf lacefern is definitely a warm-weather lover, thriving in USDA hardiness zones 9-11. If you live somewhere that sees regular frost, this might not be the fern for you – unless you’re planning to grow it as a houseplant or in a greenhouse.

Perfect Garden Situations:

  • Tropical and subtropical gardens
  • Shaded woodland areas
  • Naturalistic landscape designs
  • Understory plantings beneath trees
  • Areas that need textural interest

Growing Conditions That Make It Happy

Like most tropical ferns, the diamondleaf lacefern has some specific preferences that you’ll want to keep in mind:

  • Light: Partial to full shade – direct sunlight is a no-go
  • Soil: Moist, well-draining soil rich in organic matter
  • Humidity: High humidity levels (think tropical rainforest vibes)
  • Temperature: Warm temperatures year-round, no frost tolerance

Planting and Care Tips

Getting your diamondleaf lacefern established doesn’t have to be complicated, but there are a few key things to remember:

Start by choosing a spot that stays consistently moist but doesn’t become waterlogged. Think of forest floor conditions – damp but not soggy. Amend your soil with plenty of compost or leaf mold to create that rich, organic environment this fern craves.

Once planted, maintain consistent moisture levels and keep an eye on humidity. If you’re growing it in a drier climate, consider misting regularly or placing it near other plants to create a more humid microclimate.

Wildlife and Ecological Benefits

While ferns don’t produce the showy flowers that attract pollinators, they still play important ecological roles. The diamondleaf lacefern provides shelter for small creatures and contributes to the overall biodiversity of your garden ecosystem. Its fronds can offer hiding spots for beneficial insects and small wildlife.

The Bottom Line

The diamondleaf lacefern is a wonderful choice for gardeners in warm, humid climates who want to add some tropical elegance to their shaded spaces. Its delicate, diamond-shaped leaflets create beautiful textural contrast, and its relatively modest size makes it perfect for smaller garden spaces or as an accent plant in larger designs.

Just remember – this is definitely a warm-weather plant that needs consistent moisture and protection from direct sun. If you can provide these conditions, you’ll be rewarded with a graceful, long-lasting addition to your garden that brings a touch of the tropics right to your backyard.

Diamondleaf Lacefern

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Dryopteridaceae Herter - Wood Fern family

Genus

Ctenitis (C. Chr.) C. Chr. ex Tardieu-Blot & C. Chr. - lacefern

Species

Ctenitis hirta (Sw.) Ching - diamondleaf lacefern

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