Leopard Tree (Caesalpinnea ferrea)

Leopard trees, though often called Leopard Gums, are actually not a gum tree. They have been introduced from Brazil.
We hear more complaints about Leopard trees than perhaps any other single species. Firstly, the seeds and fine leaves clog gutters. Secondly, when mature the branches form a dense canopy that doesn’t allow sunshine through to the lawn below. The lawn can’t compete for resources and dies, leaving a bare patch of dirt.
Furthermore, mature trees can grow to twenty metres in height. The spread of the canopy matches the height, taking over several properties. Complaints from neighbours are common.
When trimming, it is important to prune in the correct place. More than any other tree, unprofessional tree loppers will prune branches to an even length leading to the death of the branch and then to dead wood. That is dangerous to both people and property, besides the destruction of the tree’s basic integrity.
The branches must be cut within 200mm of the previous fork so that auxin, a plant hormone, can aid in healing the wound. All dead wood should be removed, as well as branches that are crossing over. While using these guidelines, it is possible to still trim to customer’s desired shape and height.
The Leopard Tree roots can also cause problems. The secondary, coarse roots often venture above the surface making lawn mowing difficult. They can also create tripping hazards. It doesn’t seem to hurt the tree when we stump grind a couple of high roots.
The roots also crack water pipes and concrete paths and driveways. Tree removal is usually the practical option, though a root barrier system can be constructed.
The Brisbane City Council has many Leopard Trees on their footpaths but does not plant them. In addition, they are removing trees considered dangerous – a post 2009 storm-season policy. Complain to the council about Leopard trees on your footpath if you are concerned they may be a danger to your property.
If you have a Leopard tree in your own yard, consider removal and replacement with a more suitable tree (especially in Brisbane). Unless you are on a large property it will outgrow your yard. Of course, the longer it is allowed to grow the more expensive the eventual removal. If you are attached to it, have it trimmed. Trimming it to a garden shape now can avoid it spreading when older.