Asplenium fontanum
Care, watering, light and tips for Asplenium fontanum on Floravia.
Quick facts
- Family: Aspleniaceae
- Difficulty: Demanding
- Watering: every 3 days
- Light: Partial shade
- Temperature: 10–30 °C
About Asplenium fontanum
Asplenium fontanum, commonly known as smooth rock-spleenwort, is a small and delicate perennial fern characterized by its finely divided fronds and rock-dwelling habit. Its bright green leaves form compact rosettes, making it ideal for rock gardens, terrariums, or as an accent plant in small pots where its texture can be appreciated. It is native to calcareous rock crevices in temperate regions, preferring cool and shady locations.
Native range
Europe, Northwest Africa, and Western Asia.
Care tips
This fern prefers low to medium indirect light; direct sunlight will scorch its delicate fronds. Keep the substrate consistently moist but well-drained, avoiding waterlogging, and ensure high ambient humidity. Use a specific fern substrate or a light mix with good drainage and organic matter, preferably slightly alkaline. A common mistake is allowing the substrate to dry out completely between waterings, which will stress the plant and cause frond wilting.
How to save a dying Asplenium fontanum
- Warning signs
- Wilting, pale leaves or dry, brown tips. Stunted or slow growth.
- First aid
- Move to a cool, humid spot, away from drafts and direct sun. Water with distilled or rainwater if soil is dry. Mist leaves gently.
- What kills it
- Dry, hot environment, lack of humidity, and watering with hard water. Hates direct sun.
- Can it be saved?
- Yes, if roots are not rotted and some green leaves remain. Recovery can be slow.