Japanese Climbing Fern
Lygodium japonicum · Lygodiaceae
The gardener's calendar
Ideal time to plant japanese climbing fern: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous, very finely cut and lacy
- Adult size
- Up to 2–3 m in height (climbing growth)
- Growth
- Fast to very fast under optimal conditions
- Hardiness
- Low hardiness (warm to temperate climate, frost-sensitive below 0 °C)
- Origin
- Japan, Southeast Asia and subtropical regions
- Soil type
- Rich, well-drained, slightly acidic to neutral, peaty
- Exposure
- Partial shade to dappled shade, fears direct full sun
Care
Watering
Keep the substrate consistently moist during growth (spring–summer), without waterlogging. Gradually reduce watering in autumn and limit it in winter (dormancy). Mist the foliage regularly to recreate the humidity of its natural forest habitat.
Exposure and Light
Place the fern in partial shade or dappled shade, ideally near a window without direct rays. It tolerates dimly lit areas better than most climbing plants. Avoid midday sun exposure, which scorches the delicate foliage.
Pruning and Support
Provide sturdy support (stake, trellis or pole) to direct its climbing growth. Pinch back stems regularly to encourage branching and achieve a bushier shape. In late winter, remove dead wood or frost-damaged parts.
Fertilising
Apply a balanced, diluted fertiliser every 15 days during the growth phase (April to August). Reduce or stop feeding in autumn and winter. Prefer a fern-specific fertiliser if available.
Substrate and Repotting
Use a rich, porous mix: leaf mould, peat or coco fibre and perlite (1:1:0.5). Repot in spring every 2 years to prevent root suffocation. Ensure excellent drainage at the bottom of the pot.
Pests and Diseases
Watch for spider mites and scale insects, especially in dry air. Mist regularly with water to prevent infestations. Stagnant water causes root rot and leaf spots. Ensure good air circulation and avoid high humidity without ventilation.
Did you know?
Lygodium japonicum is the only truly climbing fern commonly cultivated: unlike its relatives, it doesn't cling with hooks, but spirals around its support like a vine. In Japan, it was traditionally used to create ornamental patterns in gardens and to cover arbours, as its delicate fronds create a stunning lacy, living effect.
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.
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Tips generated and checked by Viridia — adapt them to your local climate.