Beacon Oak is tightly columnar and urban adaptable.,Tthis oak was discovered by famed plantsman/author Dr. Michael Dirr and his wife, Bonnie. Stout upright branching structure and clean, dense green foliage make this an ideal street tree that adds a strong visual statement to any landscape. Bright yellow fall color deepens to tawny brown.Maturity: 40' tall x 15' wide. Zone 4.