A handful of pine species remain relatively small and can be considered small trees for landscaping purposes. There are several types of pine small trees for landscaping. For example, scotch pine trees. Reaching 50 feet in maximum height, the Scotch pine is one of the smallest of its pine-family brethren, and dwarf varieties make even more suitable small trees for landscaping. The Scotch pine presents bluish-green foliage in the summer that turns yellowish in the winter, and through the branches, the flaky, orange-colored bark that distinguishes it from other pine trees is visible. Although recommended for landscaping by the University of Minnesota Extension, the University of Michigan Extension cautions homeowners that the Scotch pine shows high susceptibility to pathogenic nematodes in some areas. Check with your extension office about local incidences of these pests before taking a chance with the Scotch pine.