Onoclea sensibilis (Sensitive Fern)

A genuinely aggressive colonizer under the right conditions, sensitive fern's confirmed facultative wetland status and low drought tolerance make it a reliable choice for consistently damp, shaded restoration sites - spreading via rhizomes to form dense, erosion-controlling ground cover.

Species Overview

Onoclea sensibilis, commonly known as sensitive fern or bead fern, is a deciduous perennial fern native to North America, often found in wetlands, moist woodlands, and along stream banks. It grows up to 3 feet tall, with broad, deeply lobed, light-green sterile fronds and distinctive bead-like fertile fronds that persist through winter.

Application

• Wetland restoration and moist woodland plantings
• Erosion control in shaded, consistently damp sites
• Ground cover for low-lying, shady spots - ditches, streambanks, rain gardens
• Naturalized colonizing plantings alongside other moisture-loving species

Growing Conditions / Specification Data

• Light: Part Shade to Full Shade
• Soil/Moisture Tolerance: Moist to wet, acidic soils; tolerates very wet soils with adequate oxygen but not stagnant water or sour clay
• Drought Tolerance: Low
• Flood Tolerance: High - Rated a Wet hydrology species in a formal stormwater vegetation reference table.
• Plant Type: Fern
• Mature Height: 2-4 ft.
• Fall Color: Insignificant/None - sensitive to frost, blackens quickly with cold
• Wetland Indicator Status: FACW (Facultative Wetland)
• Native Range: Newfoundland to Saskatchewan, south to northern Florida and Texas
• Pollinator Value: None significant - a spore-bearing fern with no flowers; reproduces without pollinators.
• Hydrology: Wet
• Root Depth: Shallow (Under 12 in.)
• Salinity Tolerance: Low
• Growth Rate: Rapid
• Deer Resistance: Yes (Rarely Damaged)
• Shade Tolerance: Tolerant
• Growth Habit: Spreading - creeping rhizomes, forms colonies
• USDA Hardiness Zones: 3-9

Planting Guidance

• Spreads via shallow rhizomes to form colonies - can be aggressive under prime conditions; thin if it exceeds the desired footprint.