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.
Norway spruce is a large, fast-growing evergreen coniferous tree growing 35â55 m (115â180 ft) tall and with a trunk diameter of 1 to 1.5 m (39 to 59 in). It can grow fast when young, up to 1 m (3 ft) per year for the first 25 years under good conditions, but becomes slower once over 20 m (65 ft) tall.