Southern Polypody
Polypodium cambricum · Polypodiaceae
The gardener's calendar
Ideal time to plant southern polypody: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Evergreen, semi-evergreen depending on climate
- Plant type
- Fern (Polypodiaceae)
- Adult size
- 30 to 60 cm in height, spreading habit
- Growth
- Moderate, progressive via rhizome
- Hardiness
- Hardy, down to approximately -15 °C
- Exposure
- Partial shade to full shade, dislikes direct sun
- Origin
- Europe (notably south-west Britain and Wales)
- Soil
- Well-draining, humus-rich, slightly acidic
Care
Watering
Keep the substrate moist without waterlogging it. In summer, water regularly to prevent the soil from drying out completely. In winter, reduce watering while maintaining some moisture. Prefer soft water or rainwater.
Exposure and light
Position this fern in partial shade to full shade. It tolerates direct sun poorly—strong rays will scorch its delicate foliage. A humid location sheltered from dry air currents is ideal.
Soil and substrate
Use a draining mix rich in organic matter: leaf mould, peat, or coir with fine bark. A slightly acidic pH (6 to 7) suits it perfectly. Ensure good drainage to prevent rhizome rot.
Pruning and cleaning
Remove dead or damaged fronds as the seasons progress. Regular cleanup promotes air circulation and reduces health risks. Avoid damaging the underground rhizome during maintenance.
Fertilizer
Apply diluted balanced fertilizer in spring and summer, every 4 to 6 weeks. Ferns prefer moderate feeding. A yearly application of well-decomposed compost is often sufficient.
Diseases and pests
Watch for spider mites in overly dry conditions. Scale insects may occasionally infest the foliage. Improve humidity and airflow to prevent infestations. Avoid standing water that encourages fungal rot.
Did you know?
Polypodium cambricum owes its epithet 'cambricum' to Wales (Cambria in Latin), where it was first identified. This fern was once used in folk medicine for various ailments, and remains a favourite among rare fern suppliers due to its finely cut fronds and its suitability for cultivation in shaded containers.
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
- PolypodyPolypodium vulgare
- Polypodium interjectumPolypodium interjectum
- Lecanopteris pustulataLecanopteris pustulata
- Notogrammitis billardiereiNotogrammitis billardierei
- Pleopeltis michauxianaPleopeltis michauxiana
- Licorice fernPolypodium glycyrrhiza
Tips generated and checked by Viridia — adapt them to your local climate.