Callitris columellaris
Callitris columellaris · Cupressaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around callitris columellaris and prepare for winter.
ID card
- Common name
- Callitris glaucophylle, White Tasmanian Pine
- Family
- Cupressaceae
- Foliage
- Evergreen, scaly grey-blue
- Form
- Columnar to pyramidal conifer
- Mature size
- 8 to 15 m tall, 2 to 4 m wide
- Growth rate
- Moderate to slow
- Hardiness
- Zones 9-11, frost-sensitive (-5 to 0 °C)
- Origin
- Australia, New South Wales and Tasmania
Care
Sunlight
Plant the Callitris in full sun to encourage a dense and compact silhouette. A south- or west-facing exposure is ideal in temperate regions. Partial shade is tolerable in very hot areas, but weakens the characteristic blue coloring of the foliage.
Watering
Water regularly during planting and the first year to establish a deep root system. Once established, Callitris tolerates moderate droughts and performs well in dry soils. Avoid excess water, which can promote root rot.
Soil
Callitris prefers well-drained, light, slightly acidic to neutral soil. It adapts to poor and rocky terrain and shows good tolerance to coastal sands. Improve heavy soil with sand or gravel at planting.
Pruning and training
Perform light pruning in late winter or early spring to maintain shape and remove dead or frost-damaged branches. Avoid severe cuts on old wood. Callitris has naturally elegant growth and requires little intervention.
Fertilizer
Fertilizer is generally not necessary once established, as the species adapts to poor soils. For young potted plants or in very depleted soil, apply a balanced fertilizer in spring, sparingly.
Pests and diseases
Callitris is generally robust. Watch for mealybugs and spider mites in dry climates. Waterlogging is the main risk; insufficient drainage can cause root rot. Good air circulation prevents fungal problems in humid regions.
Did you know?
Callitris columellaris is endemic to Australian coastal regions and represents a remarkable example of adaptation to chalky and sandy terrain. Its glaucous foliage (covered with blue-grey bloom) gives it a very distinctive exotic appearance, making it a sought-after species for Mediterranean and coastal gardens around the Mediterranean.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.