Royal Fern (Osmunda regalis): Regal, Flowering Fern for Watersides

Overview

The royal fern (Osmunda regalis), also called flowering fern, is a magnificent, deciduous fern native to Europe, Africa, Asia, and the Americas. Its large, bipinnate sterile fronds (3–6 feet) resemble locust leaves, while the upper portions of fertile fronds transform into dense, rusty-brown spore-bearing clusters that resemble flowers—hence "flowering fern." It forms majestic, vase-shaped clumps in wet, acidic soils.

Standout Features

• Dramatic Fertile Fronds: "Flowers" appear in early summer, turn golden then brown.
• Wetland Specialist: Thrives in standing water; ideal for pond edges.
• Royal Horticultural Society Award of Garden Merit.

Culture

Full sun to partial shade *if* soil is constantly wet; otherwise, shade. Acidic, humus-rich, consistently saturated soil. Perfect for bog gardens, stream sides, and shallow water. Hardy USDA zones 3–9.

Taxonomic Profile

Statuesque and water-loving, the royal fern brings nobility to any damp garden setting.