How to Grow Walking Fern
iNaturalist
Walking Fern
Asplenium rhizophyllum
fernWalking fern is a delicate, evergreen fern native to eastern North America, characterized by its slender, tapering fronds that arch gracefully and root at their tips to create new plants. It earned its common name from this unique reproduction method, where fronds appear to 'walk' across rocks and soil, establishing new colonies. This fern thrives in moist, shaded woodland environments and is prized for rock gardens and shade containers.
When should you plant Walking Fern in your zone?
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Example Walking Fern timeline · Pittsburgh, PA (Zone 6b)
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Plant Walking Fern
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Walking Fern
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Walking Fern dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8, with best performance in cooler zones
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Get my Walking Fern timeline →Growth Stages
Spore Germination
3-6 monthsMicroscopic spores develop gametophytes and eventually young sporophytes with tiny fronds
Maintain high humidity (80-90%) in propagation trays; use sterile, moist peat-perlite mix; provide bright indirect light; avoid disturbance
Young Plantlet
3-4 monthsEmerging fronds develop; rhizoid system establishes; fronds remain small and upright
Gradually reduce humidity to 60-70%; provide bright indirect light; keep consistently moist; avoid heavy fertilization
Developing Fern
6-9 monthsFronds elongate and begin characteristic arching; root system deepens; new fronds emerge from crown regularly
Maintain humid conditions; ensure good air circulation; water consistently; provide partial shade; no fertilization needed for wild plants; light feeding acceptable for container plants
Mature Fern
OngoingFronds reach full length and arch dramatically; pinnae are fully developed; reproductive fronds may develop spore-bearing structures at tips
Allow arching fronds to contact soil for natural propagation; maintain humidity and consistent moisture; provide shade; minimal intervention needed; remove dead fronds
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity; mist foliage regularly; isolate affected plants; use insecticidal soap or neem oil if severe; avoid overhead watering that spreads damage
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Inspect fronds regularly; remove by hand with soft cloth; apply horticultural oil in early spring; improve air circulation
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Remove with alcohol-soaked cotton swab; isolate plant; increase humidity moderately; apply insecticidal soap if widespread
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Ensure excellent drainage; avoid waterlogging; improve air circulation; reduce watering frequency if soil stays wet; repot in fresh, sterilized medium if severe
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and
Remove by hand, especially at night; reduce excessive moisture; create barriers with diatomaceous earth; avoid dense mulch around plant base
Uses
Shade Garden Ornament
HouseholdWalking fern serves as an elegant, low-maintenance groundcover or accent plant for shaded woodland gardens, rock gardens, and stone walls. Its delicate, arching fronds add texture and movement to shade spaces. [source]
Container and Indoor Growing
HouseholdIdeal for terrariums, shade containers, and indoor gardens where humidity can be maintained. Its compact size and architectural fronds make it a sophisticated houseplant choice. [source]
Rock Garden and Alpine Features
HouseholdNaturally suited to rocky, limestone-based environments, walking fern thrives in rock gardens, alpine troughs, and between stone pavers, where it spreads gently through natural propagation. [source]
Woodland Habitat Creation
WildlifeProvides shelter and microhabitat for small insects, spiders, and soil organisms; supports woodland ecosystem health and biodiversity in shade gardens. [source]
Floral Arrangements and Pressed Botanicals
CraftDelicate fronds can be dried and pressed for botanical art, herbarium specimens, and nature-inspired crafts, maintaining their elegant form when properly preserved. [source]
Harvest Tips
Walking fern is not harvested for food or flowers. For propagation, allow mature arching fronds to touch moist soil naturally; new plantlets develop at frond tips within 4-8 weeks. Alternatively, pin frond tips to soil surface with a small stone or wire loop to encourage rooting. Once new plantlets have established roots and several fronds (4-6 weeks), separate carefully and pot individually.
Fun Facts
- 🌱 Walking fern's 'walking' behavior is an adaptation allowing it to propagate beyond its initial root zone by developing new plants from frond tips—a living bridge across rock surfaces that can establish colonies several feet from the parent plant.
- 🌱 This fern prefers alkaline soils over acidic ones, making it particularly well-suited to limestone-rich areas and making it more challenging in acidic garden soils without careful pH amendment.
- 🌱 Walking fern is one of the easiest ferns to propagate at home through its natural tip-rooting mechanism, making it an excellent choice for beginners interested in fern cultivation and propagation techniques.
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