Dicksonia squarrosa, the New Zealand tree fern, whekī or rough tree fern, is a common tree fern endemic to New Zealand. It has a slender black trunk that is usually surrounded by many dead brown fronds.
Rough tree fern typically shows strong resistance to disease and is affected by relatively few insect pests. Its care is viewed as challenging because it needs a consistently moist environment and frequent watering. At the same time, its roots can rot if it is overwatered or kept in poorly ventilated conditions. Rough tree fern is best suited to people with some growing experience, since most individuals can keep it alive for a period of time. Nevertheless, it may struggle to thrive and its fronds can dry out and become less healthy as time passes.
How to keep Dicksonia Squarrosa.
Light
The rough tree fern does best with a mix of shade and light, matching its natural habitat in forest understories. Its health can decline with excessive exposure to strong sunlight, and a complete lack of light is also harmful to its growth. Moderate light intensity is suitable at every stage of development.
Water
The rough tree fern flourishes in conditions of high humidity and consistent moisture. To keep the soil evenly moist without causing waterlogging, water the plant twice a week. Using mulch can help retain moisture and simulate its natural forest habitat, as the fern typically grows in shaded outdoor areas.
Temperature
Rough tree fern originates from habitats that experience wide temperature fluctuations, typically between 68 and 95°F (20 and 35°C). To replicate these conditions, expose it to similar temperatures, which may require adjustments as the seasons change.
Pruning
The rough tree fern is characterized by its slender trunk and lush fronds. The best time to prune dead fronds is in early spring. Be sure to use clean tools to prevent the spread of disease. Concentrate on removing the lower fronds to enhance air circulation, maintain the plant's appearance, and reduce the risk of fungal issues. This will help promote a robust and thriving plant.
Pot & Repot
To ensure the rough tree fern thrives, repot it every 2-3 years during the spring. Use a slightly larger pot with good drainage. After repotting, keep the soil moist and well-draining, and protect the fern from intense sunlight. Be gentle with the roots to promote healthy growth.
Botanical profile.
- Plant Type
- Fern
- Life Cycle
- Perennial
- Genus
- Dicksonia
- Family
- Cyatheaceae
- Hardiness Zone
- 9-10
- Mature Height
- 6.1 m
- Mature Spread
- 3.66 m
- Leaf Color
- Green
- Leaf Type
- Evergreen
- Planting Time
- Summer, Autumn
- Native Area
- New Zealand
Other names.
