Sensitive fern is a large, deciduous native fern that brings the lush character of woodland wetlands to any garden willing to keep its soil consistently moist. Growing 3 to 4 feet tall and wide in hardiness zones 4 through 8, this eastern North American native features striking bright green fronds with distinctive netted veins and leathery, triangular leaflets that look nothing like typical ferns. The plant earned its common name from the tender sterile fronds that collapse at the first frost, making it a deciduous presence in the garden rather than an evergreen backdrop. Spreads steadily through creeping rhizomes and spores, eventually creating naturalized colonies that provide shelter for amphibians and reptiles.
Partial Shade
Moderate
4-8
48in H x 48in W
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Moderate
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Onoclea sensibilis grows taller and more vigorous in wet soils, making it exceptional for rain gardens and other moisture-rich spots where many ornamentals struggle. The netted venation on its bright green leaflets is genuinely striking and sets it apart from finer-textured ferns. It thrives in heavy shade and tolerates clay soil with ease, opening up shady, wet corners that seem impossible to plant. Unlike many ferns, it handles black walnut toxicity and rabbit pressure without complaint, and it never develops serious insect or disease problems.
Sensitive fern excels as a ground cover in moist, shaded woodland settings and as a naturalized plant for rain gardens and stream-side areas. Its tolerance for wet soils, clay, and heavy shade makes it invaluable for converting soggy problem spots into thriving plant communities.
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Transplant rhizomes or potted ferns in spring after the last frost date in your zone. Plant with the top of the rhizome just at or slightly below soil level, spacing 36 to 48 inches apart to allow room for lateral spread.
Remove dead fronds in early spring before new growth emerges. Sensitive fern is deciduous and loses its foliage in fall, so no pruning is needed in autumn; leaving dead fronds standing through winter provides shelter and cover for amphibians and other wildlife.
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