An example of dia used as a prefix is in the word diagnosis, which means a thorough analysis of a disease. dia- through, throughout, across: diachronic, diagram
Blue spruce evergreen trees (Picea pungens) grow wild in Western North America in U.S. Department of Agriculture plant hardiness zones 3 through 8. This erect tree produces blue-green evergreen needles that are sharp to the touch. Blue spruces reach 30 to 65 feet tall, spreading 10 to 20 feet wide. With good care this slow-growing tree can grow up to 12 inches per year. Blue spruce trees grow well as showcase trees or as part of a windbreak. Examine the location of the blue spruce tree while it is still young enough to transplant.
A cultivated variety of the Norway spruce tree, the Cupressina spruce is a smaller tree with a narrower but still column-like shape. This spruce grows to only 15 feet in height and 5 feet in width, making it appropriate for smaller spaces or for creating hedges and privacy screens.partan Chinese Juniper (Juniperus chinensis 'Spartan'). The Spartan juniper is a fast-growing evergreen tree that's appropriate for smaller yards, growing to only 12 feet tall and 5 feet wide. You can also plant several of these junipers to create a tall hedge or privacy screen.