Hart's Tongue Fern (Asplenium scolopendrium): Strappy, Evergreen Fern for Lime-Rich Shade

Overview

Hart's tongue fern (Asplenium scolopendrium) is a distinctive, evergreen fern native to Europe, Asia, and eastern North America. Unlike most ferns, its fronds are simple, undivided, and strap-shaped—glossy, bright green, and 12–24 inches long—with a prominent central rib. They form a neat, upright rosette that adds bold, architectural texture to shaded rock gardens, limestone walls, and woodland beds.

Special Requirements

• Alkaline Soil: Prefers neutral to alkaline, well-drained conditions (often limestone).
• Cool Roots: Mulch to keep root zone cool and moist.
• Air Movement: Good circulation prevents crown rot.

Garden Uses

Excellent in crevices of stone walls, alkaline rock gardens, and shaded containers. Slow to establish but long-lived. Hardy USDA zones 5–9.

Taxonomic Profile

With its bold, tongue-like fronds, Hart's tongue fern brings a unique, structural element to the shade garden.