Picea pungens 'Koster' (Colorado Spruce) is a medium-sized, evergreen conifer of elegant conical habit with prickly, brilliant silvery-blue foliage. Irregularly shaped in youth, it turns into a very attractive blue tree, lighting up the garden throughout the year. The needles display a metallic blue cast, particularly on the tips of the new growth, and mature to silver through the summer. Slow-growing (12-15 in. per year or 30-37 cm), this striking Colorado Spruce stands out in the landscape. Perfect as a focal point in a sunny border where its silvery-blue foliage will make a pleasing contrast with the other plants.

• Grows up to 15 ft. high (450 cm) and 20 ft. wide (600 cm).
• Performs best in full sun in slightly acidic, moist, well-drained soils. Tolerant of dry sites, air pollution, and salt. Some drought tolerance once established. Generally prefers cool climates and will struggle in hot and humid climate areas.
• Perfect as a distinctive specimen plant in the sunny border.
• Watch for adelgids, aphids and conifer red spider mite. Easy to grow and easy to care for.
• No pruning required.
• Propagate by grafting or semi-hardwood cuttings.