Autumn fern
Dryopteris erythrosora · Dryopteridaceae
📷 KENPEI · CC BY-SA 3.0
The gardener's calendar
Ideal time to plant autumn fern: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Semi-evergreen to evergreen depending on climate
- Adult size
- Approximately 60 cm tall
- Growth
- Moderate
- Hardiness
- Down to approximately -15°C
- Origin
- Japan and Pacific Islands
- Soil type
- Rich, well-drained, slightly acidic
- Characteristic color
- Copper-red fronds when growing, then dark green
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Dryopteris erythrosora is a fern for bright shade: no direct, scorching sunlight. Regular watering in summer, but avoid waterlogging at the base.
The common mistake
Planting it in the sun: the reddish foliage (young fronds) becomes dull, then brown.
The pro's trick
Plant it among tree roots: it thrives perfectly with light root competition—that's its natural habitat.
Care
Watering
Keep the soil slightly moist at all times, without waterlogging it. During spring and summer growth, water regularly. Reduce watering in winter, but never let it dry out completely. Prefer soft water or rainwater if possible.
Light exposure
Place your red fern in shade or partial shade. It appreciates filtered light and cannot tolerate direct sun, which burns its delicate foliage. A location near a north or east-facing window is ideal.
Soil and substrate
Use a rich and aerated substrate, enriched with organic matter or leaf mould. Slightly acidic soil (pH 5.5 to 6.5) promotes the beautiful red coloring of young fronds. Ensure good drainage to prevent root rot.
Pruning and cleaning
Regularly remove dead or damaged fronds at their base. This cleaning stimulates new frond growth and keeps the plant airy. No severe pruning necessary; the fern develops naturally in a clump.
Fertilizing
Apply diluted, balanced fertilizer once a month during the growing season (spring-summer). Choose formulas for foliage plants or ferns. Stop feeding in autumn and winter.
Pests and diseases
Watch for spider mites and scale insects, especially in dry air. Increase ambient humidity with regular misting. Root rot can occur if there is excess moisture or poor drainage.
Did you know?
The red fern owes its common name to new fronds tinted with vibrant copper-red when they first emerge. This reddish pigmentation (due to the presence of carotenoids) appears gradually before the foliage turns bright dark green. In Japan, where it originates, this fern is among the most prized ornamental species for homes and shaded gardens.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- Scaly Male FernDryopteris affinis
- Soft shield fernPolystichum setiferum
- Sword fernPolystichum munitum
- Japanese holly fernCyrtomium falcatum
- Asian netvein hollyfernCyrtomium fortunei
- Korean rock fernPolystichum luctuosum
Tips generated and checked by Viridia — adapt them to your local climate.