Russian Olive
Rating: 1
Size: 30-40 ft
Lifespan: up to 100 years
Shade: Medium shade
Type: Invasive deciduous
Russian olive trees are very hardy and difficult to kill. These trees are spread by birds eating the seeds. The light green fuzzy olive complexion leaves and flowers are fragrant and can cause allergies. Growing abundantly along ditches and rivers throughout Utah, this invasive tree poses particular harm to livestock. The large thorns are particularly noxious and are commonly found in horses feet. Cutting down this tree does not solve the problem as it will generally send up 3 or 4 more suckers right away.
Our recommendation is to cut this tree near the base, carefully remove the branches and thorns, and apply a triclopyr based herbicide to the cambium. This process will permanently kill the tree.