Pin oak is probably used more than any other native oak in the landscape. It has an interesting growth habit, with pendulous lower branches, horizontal middle branches, and upright upper branches. Its glossy green summer foliage changes to russet, red or bronze in fall.Pin oak will tolerate wet soils, but prefers moist, rich, acidic, well-drained soils. It does well in full sun and tolerates urban conditions to some extent; it is tolerant of sulfur dioxide. Pin oak develops significant iron chlorosis problems in high pH soils. Iron chlorosis must be corrected by changing the soil pH. Galls and oak wilt can also be problematic. Pin oak has been widely used in parks, golf courses, lawns and as a street tree.Pin oak has leaves 3 to 6 inches long, bristle tipped, deeply 5 to 7 lobed with wide circular or U-shaped sinuses. The leaves are smaller and the lobes are deeper than red oak and have fewer lobes than black oak. The leaves are dark green on the upper surface, and paler below with tufts of pale hairs in the axils of the veins. The twigs are slender, smooth, and green to red brown in color. Buds are 1/8 inch long, red-brown, shiny, sharp-pointed, and angled. Acorns are hemisphere shaped, light brown, striped with dark vertical lines in a cup covering only the base of the acorn with appressed, free-tipped scales. The bark on the lower trunk is gray brown and slightly ridged; on smaller trees it is smooth and light gray to brown.
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