The Norway spruce (Picea abis) is not native to North America, but will thrive in USDA zones 2B to 7A. It can reach a height of up to 100 feet with a canopy 25 to 40 feet wide. As the Norway spruce's branches grow in size and weight, they often droop. Pruning may become necessary if the tree is in a yard or near a walkway.
Water the Norway spruce during extended periods of drought in the fall and winter months.
Apply water to the Norway spruce during the middle of the day. This allows time for the water to sink into the soil before the ground freezes at night.
Apply 10 gallons of water for every inch of the tree trunk's diameter to the soil surrounding the tree.
Soak the soil to a depth of 12 inches. The root system of large trees is equal to, or larger than, the height of the tree. Ensure you cover all this area surrounding the tree when watering.
Spread a 2- to 3-inch layer of mulch on the ground, several inches outward from the tree's trunk. This will help the soil retain its moisture for longer periods of time.