Chilean hard fern (Parablechnum cordatum)
Care, watering, light and tips for Chilean hard fern on Floravia.
Quick facts
- Family: Blechnaceae
- Difficulty: Moderate care
- Watering: every 3 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Chilean hard fern
Parablechnum cordatum, commonly known as Greater Hard-fern, is a robust perennial fern featuring upright, dark green fronds that can grow up to 90 cm tall. Its fronds emerge from a horizontal rhizome, forming a dense and attractive clump. It is ideal for shady gardens, woodland edges, or as an understory plant, bringing lush texture and a prehistoric touch to the landscape.
Native range
Southern Hemisphere, including Chile, Argentina, Australia, and New Zealand
Care tips
This fern thrives in partial to full shade, protecting it from direct sun which can scorch its fronds. It requires consistently moist but well-drained soil, rich in organic matter and slightly acidic; avoid waterlogging, which can lead to root rot. A common mistake is allowing the soil to dry out completely, which will stress the plant and cause frond wilting. It benefits from a layer of mulch to maintain soil moisture and regulate temperature.
How to save a dying Chilean hard fern
- Warning signs
- Dry, brown or yellowish, brittle leaves (fronds); stunted growth. Lack of luster.
- First aid
- Increase ambient humidity (mist), check watering (slightly moist soil), and move away from drafts or direct sun.
- What kills it
- Extreme dry air, insufficient watering, or too much direct sun. It does NOT tolerate dry soil.
- Can it be saved?
- Yes, if its rhizomes are still green. Prune dead parts and optimize its environment.