Log Fern (Dryopteris celsa): Tall, Hybrid Wood Fern for Moist Shade

Overview

Log fern (Dryopteris celsa) is a robust, naturally occurring hybrid between D. ludoviciana (Florida shield fern) and D. goldiana (Goldie's wood fern). It combines the heat tolerance of the former with the stature of the latter, producing **tall, upright, semi-evergreen fronds** (3–4 feet) that form a stately, vase-shaped clump. The name "log fern" may refer to its occurrence on decaying logs in swampy woods.

Hybrid Vigor

• Imposing Height: Among the tallest Dryopteris.
• Southern Adaptability: Handles heat and humidity better than northern wood ferns.
• Semi-Evergreen: Retains foliage in mild winters.

Culture

Partial to full shade; moist to wet, rich, acidic soil. Excellent for swamp margins, rain gardens, and wet woodland borders. Sterile hybrid—does not spread by spores. Hardy USDA zones 6–9.

Taxonomic Profile

Tall, tough, and hybrid-vigorous, log fern stands sentinel in the southern shade garden.