The brisbane box is a tall evergreen tree that is classified within the Myrtaceae plant family. It has a rounded form and features oval leaves. This tree is usually planted in parks or along sidewalks. It is a favorite among landscapers since it is extremely drought-tolerant. A common problem with this tree is chlorosis, which is a plant disease characterized by yellowing leaves.
Scientifically, the brisbane box is called Lophostemon confertus, or Tristania conferta, depending on the classification system used. It is also known as the Australian bush box. This species has one cultivar, or variety, called variegata. It features yellow streaks on the leaves.
The brisbane box is native to eastern Australia. It is thought to be named after the Brisbane River located in Queensland. The brisbane box has been introduced to North America.
Generally, the brisbane box grows 60 feet (18 m) in height and spreads about 40 feet (12 m). In the early years of growth, this tree has a narrow, upright form, which eventually becomes broad with age. The bark of the tree is brown, and it easily peels away to reveal a lighter wood. The leaves are generally 4-6 inches (10-15 cm) long and about 2 inches (5 cm) wide.
The flowers of the brisbane box are creamy white and form in clusters that range in length from 3-7 inches (7-17 cm). Typically, the flowers bloom in the summer. After the flowers have fallen, a fruit with a woody exterior develops.
This tree can grow in different soil types including loamy, sandy, or clay. It is tolerant to soil that has a high pH as well as a high salt content. Well-draining soil is required for newly planted trees. As the tree becomes established in the soil, it doesn't need that much water to survive.
The brisbane box is relatively maintenance-free. It is recommended to prune the tips of younger trees to promote denser growths. Younger trees are susceptible to frost damage, so they should be somewhat sheltered during the winter.
A more serious problem which affects the brisbane box is chlorosis. It is a condition where the tree doesn't produce enough chlorophyll, which is the pigment that gives leaves their green color. There are several causes of chlorosis including poor soil drainage, damaged roots, and nutrient deficiency. If the problem is with the roots or soil, tilling and mulching are recommended measures to take. If nutrient deficiency is the cause of chlorosis, a water soluble nutrient solution should be applied onto the foliage, trunk, or soil.