How to Care for the Hoopsi Blue Spruce

Picea pungens "Hoopsii," also known as Colorado blue spruce or hoopsi blue spruce, is a needled evergreen tree favoured for its silvery, blue-green needles and attractive pyramidal form. At maturity, these low-maintenance evergreen trees reach heights of up to 50 feet with a 30-foot spread.

Hoopsi blue spruce trees thrive in full sun locations in United States Department of Agriculture (USDA) plant hardiness zones 2 through 8.

Irrigate your hoopsi blue spruce with 1 inch of water per week if rain doesn't supply an equivalent amount of moisture. Apply the water to the surface of the soil, rather than to the tree itself.

Spread a 4-inch layer of organic mulch in a 5-foot radius around the hoopsi blue spruce to help the soil conserve moisture. Keep the mulch at least 6 inches from the base of the trunk to avoid increased insect activity.

Fertilise the tree with a single application of a water-soluble evergreen fertiliser in the early spring to promote invigorated growth. Consult the instructions on the product label before applying your fertiliser.

Monitor the hoopsi blue spruce for common pests such as aphids, bagworms, scale, budworms and spider mites. Spray the foliage of infested trees with a directed stream of water to rinse away unwanted pests. Treat serious infestations with an insecticide product, used according to label directions.