Japanese Holly Fern
Cyrtomium falcatum var. maritimum
var. maritimum
About this plant
Cyrtomium falcatum var. maritimum, commonly known as the Japanese Holly Fern, is an evergreen fern with glossy, holly-like fronds that add a lush, green texture to shaded gardens or indoor spaces. It is valued for its attractive foliage and ability to thrive in low-light conditions. This variety is often used as a decorative plant in homes and gardens, especially in shaded areas where other plants may struggle.
Taxonomy
- Genus
- Cyrtomium
- Family
- Dryopteridaceae
- Higher classification
- Polypodiopsida (ferns)
- Plant type
- Houseplant
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Japan, Korea
- Distribution
- Widely cultivated in temperate regions worldwide, originally native to East Asia including Japan and Korea.
Care
- Light preference
- Partial shade
- Suitable locations
- Indoor, Outdoor, Balcony, Greenhouse
- Preferred window facing
- North-facing, East-facing, Northeast-facing, Northwest-facing
- Watering frequency
- Moderate
- Watering interval
- 3–7 days
- Humidity
- High
- Minimum
- 5 °C
- Maximum
- 30 °C
- Optimal
- 15-24 °C
- USDA hardiness zones
- 7-10
- Soil pH
- 5.5-6.5 (slightly acidic to neutral)
- Soil type
- well-draining, rich organic soil
Watering. Keep soil consistently moist but not soggy. Water when the top inch of soil feels dry. Avoid letting the plant sit in water to prevent root rot.
Fertilizing. Feed with a balanced, water-soluble fertilizer diluted to half strength every 4-6 weeks during the growing season (spring and summer). Avoid fertilizing in winter when growth slows.
This fern is quite hardy and easy to care for. It prefers shaded or partially shaded areas and moist, well-draining soil. Avoid overwatering to prevent root rot. It requires low maintenance and is suitable for beginners.
Propagation
- Propagation methods
- Division, Cuttings
- Care difficulty
- Easy
Ornamental features
- Flowering
- No
Glossy, dark green, holly-shaped fronds with a leathery texture; evergreen foliage provides year-round interest.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Not considered a weed
Non-toxic to humans and pets, safe to keep around children and animals.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Skin contact
- Pollen level
- None
Cyrtomium falcatum var. maritimum is generally safe for most people and does not produce airborne pollen that causes allergies. However, some individuals with sensitive skin might experience mild irritation if they touch the plant's fronds. To reduce any risk, avoid direct skin contact if you have sensitive skin and wash hands after handling.
Common problems
Common problems include yellowing fronds due to overwatering or poor drainage, and browning tips from dry air or underwatering. Pests are rare but watch for scale insects.
Uses
Primarily grown as an ornamental plant for indoor decoration and shaded garden areas. It helps purify indoor air and adds lush greenery.
Notes
Prune old or damaged fronds to keep the plant tidy. Repot every 2-3 years to refresh soil and allow room for growth. Sensitive to direct sunlight which can scorch leaves.