Family: Myrtaceae Origin: Queensland, Australia
Cadaghi are yet another example of an endemic tree that enjoys taking over civilized life. Especially invasive, this tree has been banned from cultivation in many parts of the world including Brisbane, where we recommend removing them. Despite all of its positive characteristics that it’s developed in the wild, these same characteristics make it a very tiresome and unsuitable plant for cultivation in urban areas. And, at first glance you might not realize that this is a gum tree, as its leaves are very wide for a bloodwood.
The Cadaghi is considered a medium to large tree, reaching around 30 metres in height and around as wide. It’s usually large and open form is imposing yet unique. It usually holds its branches in every direction, and in cultivation heavily benefits from careful pruning to train it into a suitable and attractive form for the landscape. Left on its own, it grows large and full and in every direction at once.
The trunk contains some amount of chlorophyll that helps it photosynthesize and create food. Its color is a light greyish green and usually smooth. This tree is usually found with a single short trunk where it begins to immediately branch out with main stems above the single trunk.
The flowers are very fragrant and white, and are highly attractive to pollinators. This tree blooms throughout the warm season.
Don’t necessarily expect a eucalyptus-like leaf from this tree. The leaves are broad, fuzzy, soft, and young growth leaves are reddish bronze.
The nuts of this tree are used by many, and in its native range, the attractiveness of this tree’s nuts are part of the reason why it is easily controlled from growing out of control. Bees use a resin found in these nuts to make their nests. You can find these nuts available online as some enjoy using these, and they are also enjoyed by wildlife as a food source. The nuts are urn shaped and green.
The Cadaghi is easily started from seed. So easily in fact, that it’s very invasive! You can sow seeds into pots, or plant them right away before the first frost in the ground. Germination is fast, or can take a few weeks.
Trillianas require little care once established. They enjoy lots of sun and even some shade when young, and are grown in all sorts of soils as long as they’re well-draining. This tree doesn’t require a lot of feeding or special watering.
You can help avoid spreading this tree by collecting the nuts, or bagging the flowers when they appear to stop them from pollinating and creating nuts in the future on smaller trees. Remove seedlings as you find them too. Take special care to avoid planting this tree near buildings, as it’s known to create a sap that is loved by a black and unsightly mould. When the sap is moved with high winds, the mould finds it where it lands- on houses and buildings, on cars, on anything. It’s very hard to remove and clean.