Marginal shield fern
Dryopteris marginalis · Dryopteridaceae
The gardener's calendar
Ideal time to plant marginal shield fern: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Evergreen, dark green
- Adult size
- 30 to 60 cm tall
- Growth
- Slow to moderate
- Hardiness
- Very hardy (down to -25 °C)
- Origin
- North America
- Soil type
- Humus-rich, well-drained, slightly acidic
- Exposure
- Shade to partial shade
Care
Watering
Keep the soil consistently moist but without water stagnation. Water regularly during the growing season, especially in dry periods. Reduce slightly in winter, without letting the soil dry out completely. The fronds will appreciate occasional misting.
Light Exposure
Position your fern in shade or partial shade. It tolerates direct sun poorly, as it burns the foliage. A location under trees or in dappled light is ideal for its health.
Soil Preparation
Prepare a substrate rich in organic matter, well-drained and slightly acidic. Incorporate leaf mould, peat or well-decomposed compost. Good drainage is essential to prevent root rot.
Fertilization
Apply a balanced, highly diluted fertilizer once or twice during spring-summer. An established fern in rich soil won't need much. Prefer moderate organic additions to overfeeding.
Pruning and Cleaning
Remove dead, damaged or yellowing fronds as you go. Do not prune healthy fronds. Clear debris accumulated at the base to prevent rot and reduce pest habitats.
Diseases and Pests
Watch for red spider mite attacks in dry conditions and scale insects. Excessive stagnant moisture can promote root rot or fungal problems. Increase air circulation and adjust watering if issues arise.
Did you know?
Dryopteris marginalis, native to forests in eastern America, is called the 'marginal wood fern' because its sporangia are arranged in a line on the margin of the pinnules. This distinctive pattern makes it one of North America's most recognizable ferns, and it has long been used by amateur botanists as a reference specimen for studying fern fructification.
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
- Scaly Male FernDryopteris affinis
- Soft shield fernPolystichum setiferum
- Sword fernPolystichum munitum
- Autumn fernDryopteris erythrosora
- Japanese holly fernCyrtomium falcatum
- Asian netvein hollyfernCyrtomium fortunei
Tips generated and checked by Viridia — adapt them to your local climate.