Wattles are popular in cultivation and, with so many to choose from, selecting suitable species rarely presents a problem. They are often regarded as being quick growing but short lived and to a certain extent this is true but they are particularly useful for providing quick growth to cover the stark, empty look of a new garden. Most should live from 12 to 15 years in suitable conditions but many will last much longer.
Borers can be a problem with some of the tree species, particularly those in the "Black wattle" group which includes A.decurrens, A.parramattensis and A.mearnsii. These trees often grow very rapidly but then deteriorate after 7-8 years as the damage inflicted by borers becomes more than the plant can cope with. By the time the tree dies, it is often very large and spreading and difficult to remove safely. This group is probably not ideal for small suburban gardens. Many of the smaller wattles, however, are probably no more susceptible to borers than other garden plants.
Maintenance of wattles in the garden is fairly straight forward and should not involve much more than a light pruning to shape the plant in its early years and an occasional application of fertilizer, preferably of a slow-release type.
A few species of Australian acacias have proved to be weed pests in other parts of the world. In South Africa, for example, A.saligna, A.cyclops, A.melanoxylon, A.mearnsii, and A.decurrens cause serious problems and no natural predators exist to keep them under control. A few, also should be planted with caution in Australia. A.paradoxa, for example, has been reported as being a problem in parts of Victoria and even the popular Cootamundra wattle (A.baileyana), Queensland silver wattle (A.podalyriifolia) and golden wreath wattle (A.saligna) are weeds of the Sydney bush and other areas. These species should not be planted in gardens in the vicinity of natural bushland.
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Updated: Monday 23 January 2006.
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