Small Trees

• Several evergreens, or trees that keep most or all their foliage year-round, have blue, silver-blue or blue-green foliage. These include the Candicans white fir (Abies concolor "Candicans"), which has long, silvery-blue needles. This narrow tree grows up to 12 feet tall with an 8-foot spread. Plant this tree in moderately moist soil but avoid clay soils. The blue dwarf Rocky Mountain fir (Abies lasiocarpa "Glauca Compacta") also has silver-blue foliage. This slow-growing tree reaches heights of 15 feet and spreads to 9 feet. This tree also prefers moist, well-drained soil. The Wichita Blue Rocky Mountain juniper (Juniperus scopulorum "Wichita Blue") has bright blue foliage. This drought-tolerant tree grows up to 12 feet tall with a 6-foot spread.
  
  

Large Trees

• The Glacier Blue deodar cedar (Cedrus deodara "Glacier Blue") has blue-green needles. This finely-textured tree grows up to 70 feet tall with a spread up to 40 feet. The deodar cedar also produces bluish cones. Plant in sun to partial shade in well-drained, dry soil. The Wichita Blue Italian cypress (Cupressus sempervirens "Wichita Blue") has blue-green foliage. This columnar tree grows to 30 feet with a spread to 5 feet. Italian cypress prefers full sun and tolerates a range of soils. The Colorado blue spruce (Picea pungens glauca) grows up to 60 feet with a 25-foot spread. This columnar tree has sharp, blue needle-like foliage. Colorado blue spruce does best in moist, well-drained soil.
  
  

Blue Flowering Trees

• The lilac chaste-tree (Vitex agnus-castus) grows between 10 and 18 feet tall with a similar spread. This drought-tolerant tree produces spikes of fragrant, blue flowers in early to midsummer. Plant lilac chaste-tree in full sun. The fern tree (Filicium decipiens) produces blue flowers year-round in warm climates. This slow-growing evergreen tree tolerates full sun to partial shade and grows up to 35 feet tall.
  
  

Blue Fruiting Trees

• Female Eastern red cedars (Juniperous virgniana) produce blue berries. This North American native grows up to 40 feet tall and prefers full sun. The devilwood (Osmanthus americanus) produces deep-blue fruit in the autumn. This evergreen tree grows up to 25 feet tall and thrives in sun to partial shade. The silky dogwood (Cornus amomum), a deciduous tree, produces blue, specked fruits in late summer. This small tree grows from 6 to 10 feet tall and prefers sun to partial shade. The fringetree (Chionanathus virginicus) and Chinese fringetree (Chionanthus retusus) also produce blue fruits. These deciduous trees thrive in full sun to partial shade and grow to 20 or 25 feet tall.