Dacrycarpus

Description

Dacrycarpus is a genus of evergreen trees and shrubs belonging to the Podocarpaceae family. These plants are commonly found in the southern hemisphere, particularly in Australia, New Zealand, and New Caledonia. They are known for their narrow, conical shape and soft, needle-like leaves that are arranged spirally on the branches. Dacrycarpus are dioecious, meaning they have separate male and female trees. The female trees produce small, fleshy cones that contain a single seed.

Taxonomic Information

Appearance

Dacrycarpus trees can grow up to 25 meters tall, with a narrow, conical shape. The leaves are soft and needle-like, about 1-2 cm long, and arranged spirally on the branches. The male trees produce small, yellowish-green cones that are about 0.5-1 cm long. The female trees produce small, fleshy cones that turn purple when ripe and contain a single seed.

Care Guide

Dacrycarpus trees are relatively easy to care for, but they do require some attention.

• Water: Dacrycarpus trees prefer moist soil, so make sure to water them regularly, especially during dry periods. Avoid overwatering, as this can lead to root rot.
• Fertilization: Fertilize your Dacrycarpus tree in the spring and summer with a balanced fertilizer. Follow the package instructions for application rates.
• Soil: Dacrycarpus trees prefer well-draining soil that is rich in organic matter. Avoid heavy clay soils.
• Sunlight: Dacrycarpus trees prefer partial shade to full sun. In hot, dry climates, they may benefit from some afternoon shade.
• Hardiness Zones: Dacrycarpus trees are hardy in USDA zones 8-11.

Common Pests & Diseases

Dacrycarpus trees are relatively pest and disease-free, but they can be susceptible to some issues.

• Scale insects: These insects can infest the leaves and branches of Dacrycarpus trees, leading to yellowing and wilting of the leaves. Use an insecticidal soap or neem oil to control scale infestations.
• Root rot: Overwatering or poorly-draining soil can lead to root rot, which can be fatal to Dacrycarpus trees. Make sure to plant them in well-draining soil and avoid overwatering.

Habitat

Dacrycarpus trees are native to the southern hemisphere, particularly in Australia, New Zealand, and New Caledonia. They are commonly found in rainforests and other moist, wooded areas. Some species of Dacrycarpus are also grown as ornamental trees in gardens and parks.

Question and Answer

Q: Are Dacrycarpus trees fast-growing?

A: No, Dacrycarpus trees are relatively slow-growing.

Q: Can Dacrycarpus trees be grown in containers?

A: Yes, but they may not reach their full potential size in containers.

Q: Do Dacrycarpus trees require pruning?

A: No, Dacrycarpus trees do not require pruning, but you can prune them if you want to shape them or remove any dead or damaged branches.

Q: Can Dacrycarpus trees tolerate frost?

A: No, Dacrycarpus trees are not frost-tolerant and should be grown in frost-free areas.

Related Plants

• Araucaria
• Cryptomeria
• Pinus
• Podocarpus

References

• “Dacrycarpus.” Flora of New Zealand. Landcare Research, 2017.
• “Dacrycarpus.” Flora of Australia Online. Australian Biological Resources Study, 2011.
• “Dacrycarpus.” The Gymnosperm Database. Christopher J. Earle, 2021.