Define dia-. dia- synonyms, dia- pronunciation, dia- translation, English dictionary definition of dia-. or di- pref. 1. Through: diachronic. 2. Across: diatropism. or prefix 1. through, throughout, or during: diachronic. 2. across: diactinic. 3.
Print This Page. Baby Blue Eyes Spruce is a conical-shaped, fully branched selection of Colorado Spruce with a uniform growth habit and intense blue needles. On the average it will grow upward about 8 inches per year compared to some Colorado Spruce that can grow as much as 12 to 18 inches upward per year. Since it is a grafted plant , the growth rate can vary depending on the rootstock (understock) that it is grafted on to.
The trees grow well within U.S. Department of Agriculture plant hardiness zones 3 to 8, where they will reach a mature height of 30 to 65 feet with a 10- to 20-foot spread. Blue spruce trees grow reliably well from tip cuttings harvested in summer, which will root successfully in two to three months.