Araucaria cunninghamii QUEENSLAND PINE (5 seeds)

Araucaria, also known as the Queensland Pine or Hoop Pine, is a very rare conifer from the Araucariaceae family. It is primarily found in Australia, in the Queensland region, which gives it its name. This variety of Araucaria can live up to 450 years and reach a height of 60 meters.

Its leaves are evergreen needles that are rigid and sharp. They are arranged in a spiral around the branches, giving the tree a dense and bushy appearance. Their color varies from bright green to dark green, and they generally measure between 2 and 4 centimeters in length.

The flowers are discreet and not very spectacular. Males produce cylindrical cones, measuring about 5 to 10 centimeters long, which release pollen in the spring. Females form larger, rounded, woody cones that appear at the end of summer. Although inconspicuous, these flowers play an essential role in the tree's reproduction.

Its fruits are woody, globular cones that can reach up to 10 centimeters in diameter. They ripen slowly, usually taking two to three years before releasing their seeds. When they fall to the ground, the cones open to release their precious seeds.

Australian Araucaria seeds are long, flat, and triangular in shape. They are edible, rich in nutrients, and appreciated for their sweet flavor and crunchy texture.

- Properties and Uses:

This tree is often used in landscaping; it is grown as an ornamental tree due to its beauty and distinctive shape, bringing an exotic touch to gardens and parks. The Queensland Pine produces durable and resistant wood. Its aesthetic appearance makes it a preferred material for furniture construction, wall paneling, or flooring. As a native tree, it plays an important role in its local ecosystem by providing a habitat for birds and insects. In the past, the tree's resin was used by Australian Aborigines as a cement.

- Sowing and Germination:

• The most favorable period for sowing the Queensland Pine is in May.
• Sow the seeds with the point facing down in a substrate made of horticultural potting soil mixed with sand.
• Water gently and then place the culture in a spot where the temperature is between 15 and 25°C.
• Germination generally begins between 4 to 8 weeks after sowing.

- Soil and Substrate:

This conifer prefers well-drained soil, rich in organic matter with a slightly acidic pH. A mix of light peat, heather soil (terre de bruyère), and compost is perfect for encouraging healthy rooting. Avoid overly clayey or compact soils that retain too much water.

- Exposure and Light:

This species of Araucaria develops best in full sun or partial exposure. It requires bright light to grow correctly but can tolerate light shade, especially during the hottest hours of the day.

- Temperature and Hardiness:

Native to temperate regions, it can tolerate temperatures ranging from 5°C to 30°C. However, it is sensitive to prolonged frost and extreme temperatures. In temperate climates, it flourishes best in moderate temperatures and may require protection against intense cold during the winter.

- Watering and Irrigation:

Watering should be regular but moderate. It is important to keep the soil slightly moist, especially during periods of heavy growth. During prolonged droughts, additional watering may be necessary, but always allow the soil to dry slightly between waterings.

- Propagation:

Cunningham's Araucaria reproduces solely through its seeds. It cannot be layered and cannot be grown from cuttings.

- Pests and Diseases:

The tree is subject to various pests, including bark beetles, which damage tissues by feeding on the bark and digging galleries. Aphids can also weaken the tree by feeding on its sap. Regarding diseases, it is vulnerable to fungal infections like root rot caused by Phytophthora, leading to progressive dieback. Symptoms include yellowing of the leaves and premature leaf drop.

- Maintenance:

This tree requires no specific maintenance.