By Mary H. Dyer, Master Naturalist and Master Gardener Acacias are graceful trees that grow in warm climates such as Hawaii, Mexico and the southwestern United States. The foliage is typically bright green or bluish-green and the small blooms may be creamy white, pale yellow or bright yellow. Acacia may be evergreen or deciduous. Acacia Tree Facts Most acacia tree types are fast growers, but they usually live only 20 to 30 years. Many varieties are valued for their long roots which help stabilize the soil in areas threatened by erosion. The sturdy roots reach deep for underground water, which explains why the tree tolerates extreme drought conditions. Many types of acacia are protected by long, sharp thorns and an extremely unpleasant flavor that discourages animals from eating the leaves and bark. Acacia Tree and Ants Interestingly, stinging ants and acacia trees have a mutually beneficial relationship. Ants create cozy
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