Spruce (Picea sp.) Colorado (P. pungens) Type: Coniferous Zone: 3 Height and Width: 100' tall Shade Density: Dense Fall Foliage: Not Applicable Soil Preference: Well-drained Comments Dark green to pale blue foliage. Use as specimen tree. Mature trees lose lower branches. White (P. glauca) Type: Coniferous Zone: 2 Height and Width: Shade Density: Dense Fall Foliage: Not Applicable Soil Preference: Well-drained Comments Use as a specimen or in windbreak. Dwarf varieties work well in foundation plantings. Black Hills spruce (P. glauca 'densata') is a smaller form of white spruce.