Marginal Woodfern

Marginal Woodfern (Dryopteris marginalis)

Marginal Shield-fern

Part shade to full shade, tolerates heavy clay soils, medium to moderately dry moisture; more drought-tolerant than most native ferns once established.

1.5–2 feet tall by 1.5–2 feet spread; evergreen fronds persist through winter, turning blue-green with age; does not produce showy flowers; spreads slowly by rhizome to form clumps.

Native region: Statewide in Tennessee, concentrated in moist woodland slopes and ravines; one of the most widely distributed native ferns in the state.

The sori (spore cases) are positioned at the margins of the pinnules — hence the common name — making identification straightforward in the field. Unlike Dryopteris intermedia or D. goldiana, this species tolerates drier conditions and is the most practical Dryopteris for home landscapes in the Columbia area, where clay soils and summer dry spells are typical. Evergreen habit makes it useful for year-round understory coverage beneath deciduous hardwoods. Division in early spring is the preferred propagation method; clumps establish quickly in amended clay.