Onoclea sensibilis
Bead fern
Onoclea sensibilis, commonly known as the sensitive fern, is a deciduous fern prized for its unique traits. Its fronds, sensitive to light and temperature changes, curl during drought or frost.
Thriving in moist, shady habitats like woodlands and stream banks, it reaches heights up to three feet. With vibrant green fronds emerging in spring, it adds texture and interest to gardens. Hardy and adaptable, it’s a sought-after choice for landscaping. Discover how Onoclea sensibilis can enhance your garden with its distinct features and resilience.
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Plant Biography
Onoclea sensibilis derives its name from descriptive origins. “Onoclea” originates from the Greek words “onos,” meaning vessel, and “kleio,” meaning to close, referencing the tightly rolled sori on its fertile fronds. The species epithet, “sensibilis,” originates from Late Latin, signifying sensitivity, aptly describing its high sensitivity to the first frost of autumn and periods of drought.
Although often considered to originate only from North America, another variety is present in southeast Siberia, Japan and China. The variety commonly found in horticulture is the North American variety, often referred to as Onoclea sensibilis var. sensibilis.
Care & Size Guidance
Onoclea sensibilis, the sensitive fern, thrives in partial to full shade and moisture-retentive soil, making it ideal for woodland gardens and damp areas. Regular watering is essential, particularly during dry spells, to maintain soil moisture levels. It typically grows to heights of up to one metre, forming large clumps over time.
While tolerant of various soil types, it prefers slightly acidic to neutral conditions. Mulching around the base helps retain moisture and suppresses weed growth. Pruning dead fronds in late winter or early spring rejuvenates the plant and encourages new growth, ensuring its vigour and longevity in the garden landscape.
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