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The selection of trees for planting in urban areas poses severe challenges due to soil adversities and space restrictions both above and belowground. Restricted spaces, especially in 'downtown' situations or in densely built neighborhoods, make selecting, planting, and managing trees in urban areas difficult. Urban sites pose adversities that severely constrain the palette of suitable trees. As a result, an urgent need exists to find tough, small species of trees for urban spaces. Dwarf forms of native species have not been utilized greatly, and some foreign species may prove to be appropriate.
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