Maidenhair Fern (Adiantum): Care Guide for Delicate Lacy Foliage

Maidenhair Fern (Adiantum spp.)

Maidenhair Ferns are the epitome of delicacy: wiry black stems hold tiny, fan-shaped, bright green leaflets that flutter at the slightest breeze. They demand high humidity and consistent moisture, rewarding care with unmatched grace. Perfect for terrariums, bathrooms, or shaded patios.

Quick Facts

• Common Names: Maidenhair Fern, Delta Maidenhair, Venus Hair Fern
• Botanical Name: Adiantum spp. (A. raddianum, A. capillus-veneris, etc.)
• Mature Height: 6–36 in (15–90 cm)
• Pet Safety: Non-toxic

Essential Care Requirements

Light

Bright indirect to medium. No direct sun. Terrarium or north window ideal.

Temperature

60–75°F (15–24°C). Avoid drafts.

Watering

Keep soil constantly moist (never dry). Use room-temp water.

Humidity

Critical: 60%+. Terrarium, humidifier, daily mist, pebble tray.

Soil

Rich, peat-based, moisture-retentive.

Fertilizer

Monthly spring–summer very diluted.

Repotting

Spring when root-bound. Divide if desired.

Propagation

Division or spores (difficult).

Common Problems & Solutions

• Crispy brown fronds: Low humidity or dry soil.
• Yellowing: Overwatering or poor drainage.
• Pale growth: Too much light or need fertilizer.
• Pests: Scale, mealybugs. Inspect stems.