Dryopteridaceae erythrosora, commonly known as the Autumn Fern, is a type of deciduous or semi-evergreen fern in the Dryopteridaceae family. It is native to East Asia, including Japan, China, and Korea.

Plant Type:

Category: Fern

Growth Habit: Clumping, upright, and spreading

Foliage: Coppery-red new fronds that mature into deep green

Hardiness Zones: USDA 59 (tolerates mild frost)

Ideal Growing Conditions:

Light: Prefers partial to full shade

Humidity: Prefers moderate to high humidity

Soil: Moist, well-draining, and rich in organic matter

Watering: Keep soil consistently moist but avoid waterlogging

Uses:

Popular for shade gardens, woodland gardens, and indoor fern collections

Adds year-round texture to landscapes

Suitable for container gardening

Autumn Fern (Dryopteris erythrosora) Care Guide

The Autumn Fern (Dryopteris erythrosora) is a beautiful, hardy fern known for its coppery-red new growth that matures into deep green fronds. It is a low-maintenance, shade-loving plant that thrives in gardens and indoor pots, making it a great choice for both beginners and experienced plant lovers.

1. Light Requirements

Best: Partial to full shade

Tolerates: Dappled sunlight

Avoid: Direct afternoon sun (can scorch leaves)

Tip: If growing indoors, place it near a north- or east-facing window for indirect light.

2. Watering

Keep the soil consistently moist but not soggy

Water when the top 23 cm (1 inch) of soil feels dry

Avoid overwatering, as it can lead to root rot

Tip: Water at the base to keep fronds dry and prevent fungal issues.

3. Humidity & Temperature

Prefers moderate to high humidity (4060%)

Ideal temperature: 1525C (5977F)

Avoid dry air, cold drafts, or sudden temperature changes

Tip: If indoors, use a humidity tray or occasional misting to keep fronds from drying out.

4. Soil & Potting

Use well-draining, rich organic soil

Best mix: 50% peat or compost + 50% sand or perlite

Avoid heavy, clay-like soil that retains too much moisture

Tip: Adding mulch around the base helps retain moisture and regulate temperature.

5. Fertilizing

Apply a balanced liquid fertilizer (half-strength) every 46 weeks during spring and summer

Avoid over-fertilizingexcess nutrients can harm the plant

Tip: Use an organic compost or slow-release fertilizer in garden beds for steady growth.

6. Pruning & Maintenance

Remove old, yellow, or damaged fronds to encourage new growth

Trim back in late winter or early spring before new growth appears

Tip: If the fern looks tired, cut back old fronds to allow fresh ones to emerge.

7. Repotting

Repot every 23 years or when roots outgrow the container

Best time to repot: Early spring

Tip: If the plant looks crowded, divide it into smaller sections and replant.

8. Propagation

Best method: Division

Divide the root ball during repotting

Replant sections in fresh soil, keeping roots moist

Does not propagate from leaf cuttings or spores easily indoors.