The Austree—The Tree From Australia
The Austree, or “tree from Australia”, is a hybrid willow botanically known as Salix matsudana x alba.
A few companies have been selling this tree throughout America through promotional literature that touts this tree as capable of growing 10 feet per year.
This tree has proven popular in many areas. However, as with many fast-growing trees, there is a higher potential for problems than with slow-growing trees. As always, it is best to check with your local Cooperative Extension Service.
As a caution, the Colorado State University Cooperative Extension has this to say for Colorado homeowners (This will apply in many drier areas.):
This willow, like other willows, must have plenty of water and will show dieback if it experiences any drought, summer or winter. Fast-growing trees, such as willows, are susceptible to storm damage. Willows have vigorous, extensive root systems that can invade and clog sewer lines. If planted in the Denver area, homeowners also can expect the tree to be short-lived, prone to winter injury, chlorosis, bacterial wetwood, aphids and canker diseases. Many more desirable landscape plants are available.