Dicksonia squarrosa
Dicksonia squarrosa · Dicksoniaceae
The gardener's calendar
Ideal time to plant dicksonia squarrosa: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Evergreen, light green
- Adult size
- 3 to 6.5 feet tall, 3 to 5 feet wide
- Growth
- Slow to moderate
- Hardiness
- Tender, prefers humid temperate climate (-5 to 0 °C)
- Origin
- New Zealand
- Soil type
- Rich, humus-based, very well-draining
- Exposure
- Partial shade to dappled shade
Care
Watering
Keep the substrate consistently moist but never waterlogged, as the roots fear asphyxiation. During summer, water regularly and mist the foliage to recreate the natural ambient humidity. Reduce slightly in winter, without letting the soil dry out completely.
Light Exposure
Prefer partial shade or dappled shade, away from direct sunlight. This tree fern appreciates a bright but filtered light environment, characteristic of its natural forest habitat in New Zealand.
Soil and Substrate
Use soil rich in organic matter, composed of peat, pine bark, and perlite to ensure optimal drainage. Soil that is too compact or poor would lead to progressive decline of the plant.
Pruning and Cleaning
Remove only dead or damaged fronds at the base of the trunk. Avoid cutting the apical heart that bears the new fronds. Simple cleaning of damaged leaves is enough to maintain an attractive appearance.
Fertilizing
Apply a balanced liquid fertilizer every 15 to 20 days during active growth (spring-summer). In autumn-winter, space out applications or stop them, as the plant naturally slows its metabolism.
Diseases and Pests
Watch for spider mites and scale insects in environments that are too dry. Excess moisture promotes rot and fungal diseases. Good air circulation and regular humidity prevent most problems.
Did you know?
Dicksonia squarrosa is one of the oldest living lineages of ferns in the world: its ancestors thrived back in the age of dinosaurs. In New Zealand, where it grows naturally in humid forests, it can live for several centuries and reach impressive proportions, forming majestic 'tree ferns' in the forest landscape.
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.