Pine (Pinus sp.) Bristle-Cone or Hickory (P. aristata) Variable shape. Dark blue-green needles in clusters of five, 1 to 1-3/4 inches long. Zone: 6 Light and Soil: Well-drained soil. Height: 10-40' Comments Slow growing. Picturesque branching habit. Use as specimen tree or as an accent. Especially good in patio tubs so can be moved for effect. Prune after spring growth has started. Dwarf White (P. strobus 'nana') Dense; rounded to conical. Soft green needles in bundles of five, 4 inches long. Zone: 4 Light and Soil: Well-drained soil. Height: 6' Comments Slow growing. Use in foundation plantings or as a part of rock gardens. Prune after spring growth has started. Mugo, Mountain (P. mugo) Dense; rounded, low spreading. Bright green needles in pairs, 1-1/2 to 3 inches long. Zone: 4 Light and Soil: Well-drained soil. Height: 30' Comments Slow growing. Use in foundation plantings. Subject to scale infestation. Prune after spring growth has started.