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Korean Rock Fern
Polystichum tsus-simense | Synonym:Â Polystichum luctuosum
Other Names: Tsu-sima Rock Fern
Plant Details
USDA Plant Hardiness Zones: 6a-9b  Find Your Zone
Plant Type:Â Semi-Evergreen to Evergreen Perennial, depending on climate
Height at Maturity:Â 12-18″
Width at Maturity:Â 18″+
Spacing:Â 15-18″ for mass plantings
Spacing:Â 15-18″ for mass plantings
Growth Habit / Form:Â Arching Clump
Growth Rate:Â Moderate
Flower Color: Â None
Flower Size:Â NA
Flowering Period:Â NA
Flower Type:Â NA
Fragrant Flowers:Â NA
Foliage Color:Â Bright Green new fronds mature to Dark Green
Fragrant Foliage:Â No
Berries:Â Â No
Berry Color:Â NA
Sun Needs:Â Full Shade or Part Shade, Morning Sun With Afternoon ShadeÂ
Water Needs:Â Â Average
Soil Type:Â Â Clay (amend heavy clay soil to ensure good drainage), Loam, Sand (amend quick draining soils for moisture retention), SiltÂ
Soil Moisture / Drainage:Â Moist But Well-Drained to Wet
Soil pH:Â 6.5 – 7.5 (Slightly Acid to Slightly Alkaline)
Maintenance / Care:Â Low
Attracts:Â Visual Attention
Resistances:Â Deer, Disease, Heat, Humidity, Insect, Moist Soil, Rabbit, Shade, Wet Soil
Description
Excellent for garden beds, pots or as a year round houseplant, the Korean Rock Fern is a long-lived evergreen to semi-evergreen charmer adorned with black stems and delicately laced bright green fronds that mature to deep green. At only 15 to 18 inches tall and equally as wide forming an attractive, neat tuft, this low-growing fern is a perfect fit as an accent in shady smaller garden spaces or a low border or groundcover in garden beds or along paths and walkways. Winner of the Award of Garden Merit by the Royal Horticultural Society, this refined beauty is an attractive asset in the shade garden.
Landscape & Garden Uses
Growing 12 to 18 inches tall and equally as wide, the Korean Rock Fern is ideal for use in garden beds or indoor or outdoor containers. It is ideal for use as an accent in small garden spaces or in groupings or as a groundcover in garden beds or along paths and walkways. Excellent as a solo in small outs or as an accent combined with other shade-loving perennial plants. Also nice in shady home foundation plantings and around garden ponds. A fine addition to fern gardens, rock gardens, woodland gardens and Asian theme gardens.
Note:Â For our customers who live and garden north of USDA Plant Hardiness Zone 6a, where this fern variety is not reliably winter hardy, you’ll be happy to know it can be grown in containers that can be brought indoors during winter and placed back outside when temperatures warm up in spring.
Growing Preferences
The Korean Rock Fern is easy to grow in most any moist but well-drained soils of average fertility in part shade to full shade. It prefers a consistently moist to even wet soil rich in organic matter however will tolerate short dry periods when established.
Helpful Articles
Click on a link below to find advice from our experts on how to plant, fertilize, prune and water perennial ferns.
How To Plant Perennial Ferns
How To Prune Or Cut Back Perennial fern Plants
How To Fertilize & Water Perennial Fern Plants
Plant Long & Prosper!
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Questions? Contact Us!
The fern is compact at this stage with a lovely form. It arrived in excellent condition and well packed. I like this fern so much I am thinking of adding more of this specimen to my garden.————————————————-We are so glad you are pleased and we hope you enjoy it for years to come! Thanks for the kind words and great review! 🙂 Beth Steele | WBG
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