Ostrich fern
Claytosmunda claytoniana · Osmundaceae
The gardener's calendar
Ideal time to plant ostrich fern: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Adult size
- 0.6 to 1 m in height
- Growth
- Moderate
- Hardiness
- Very hardy (down to -20°C)
- Origin
- North America
- Soil type
- Moist, rich in organic matter
- Exposure
- Partial shade to shade
Care
Watering
Keep the soil constantly moist but well-drained, especially during the growing season. This fern appreciates a humid atmosphere and benefits from regular misting of the foliage. In summer, increase watering frequency during dry periods.
Exposure
Place it in partial shade or dappled shade, ideally near a water source or in a woodland setting. It tolerates shadier areas but prefers some indirect light for optimal development.
Soil
Choose a substrate rich in organic matter, acidic to neutral, with excellent moisture retention. Incorporate compost or peat when planting to improve structure and nutrient content.
Pruning
Remove dried or damaged fronds in spring from the previous year. No formal pruning is necessary; let the fern develop naturally while respecting its spreading habit.
Fertilizing
Apply a light balanced fertilizer in spring during budbreak. A well-established fern in rich soil requires little supplementation; favor organic applications (surface compost).
Diseases and Pests
Generally very robust and little susceptible to parasites. Watch for root rot in case of prolonged waterlogging. Ensure good air circulation and adequate drainage to prevent any fungal issues.
Did you know?
Clayton's fern bears the name of American botanist John Clayton (1693–1773) who discovered it. Its fertile fronds stand out through very distinctive morphology: they are shorter and more upright, with their segments completely transformed into dark brown sporangia, offering a fascinating botanical spectacle in spring.
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
- Royal fernOsmunda regalis
- Cinnamon fernOsmundastrum cinnamomeum
- Osmunda spectabilisOsmunda spectabilis
- Osmunda japonicaOsmunda japonica
- CamelliaCamellia japonica
- GrapevineVitis vinifera
Tips generated and checked by Viridia — adapt them to your local climate.