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TREES & plants

White spruce

White spruce is a large, pyramidal evergreen with aromatic foliage and uniform habit. This popular garden conifer is native to Canada and the northwestern United States. When sited properly white spruce can be a long-lived attractive addition to any landscape.

This plant has some cultivated varieties. Go to list of cultivars.

 

Botanical name: 
Picea glauca
All Common Names: 
white spruce, Canadian spruce
Family (English): 
Pine
Family (Botanic): 
Pinaceae
Tree or Plant Type: 
  • Tree
Native Locale: 
  • North America
Planting Site: 
  • Residential and parks
Landscape Uses: 
  • Windbreak
  • Specimen
  • Shade
  • Screen
Size Range: 
  • Large tree (more than 40 feet)
Mature Height: 
40-60 feet
Mature Width: 
10-20 feet
Light Exposure: 
  • Full sun (6 hrs direct light daily)
  • Partial sun/shade (4-6 hrs light daily)
Hardiness Zones: 
  • Zone 2
  • Zone 3
  • Zone 4
  • Zone 5
  • Zone 6
Soil Preference: 
  • Moist, well-drained soil
Acid Soils: 
  • Tolerant
Alkaline Soils: 
  • Moderately Tolerant
Salt Spray: 
  • Intolerant
Soil Salt: 
  • Intolerant
Drought Conditions: 
  • Intolerant
Poor Drainage: 
  • Intolerant
Foliage: 
  • Evergreen (foliage year-round)
Season of Interest: 
  • Early winter
  • Mid winter
  • Late winter
  • Early spring
  • Mid spring
  • Late spring
  • Early summer
  • Mid summer
  • Late summer
  • Early fall
  • Mid fall
  • Late fall
Flower Color & Fragrance: 
  • Inconspicuous
Shape or Form: 
  • Pyramidal
Growth Rate: 
  • Slow
Transplants Well: 
  • Yes
Wildlife: 
  • Birds
  • Browsers
  • Small mammals
More Information: 

Tree & Plant Care

Best in full sun. Tolerant of clay soil but good drainage is a must.
The shallow, spreading root system benefits from a 3-4” layer of organic mulch.
Spruce need very little in the way of pruning.

Disease, pests, and problems

Cankers, root rots and needlecast diseases.
Bagworm, sawfly and needle miners. One of the hosts for eastern spruce gall adelgids.

Native geographic location and habitat

Native to Canada and the northwestern United States in moist, cool climates. 

Bark color and texture 

Gray to silvery gray and scaly or flaky.

Leaf or needle arrangement, size, shape, and texture

Evergreen.  Pale green pointed needles are 1/2 to 3/4 inch long, 4-sided, often crowded on the upper surface of the stem. 
The aromatic needles can persist for 3 to 4 years before dropping. 

Flower arrangement, shape, and size

Both male and female flowers are small and insignificant, found on the same tree.

White spruce (Picea glauca)White spruce (Picea glauca)photo: John Hagstrom

Fruit, cone, nut, and seed descriptions

White Spruce has the smallest cones of any of the spruces, typically 1 to 2 inches long, cylindrical and pendulous, often clustered near the top of the tree. They are a medium green color throughout much of the summer, and turn brown in autumn and winter. Cones scales are thin, rounded and have smooth margins. A favorite of many birds.

Cultivars and their differences 

Dwarf Alberta Spruce (Picea glauca 'Conica'): 6 to 8 feet high and 4 to 5 feet wide; pyramidal; extremely slow, seldom produces cones. Good for small spaces.

Black Hills Spruce  (Picea glauca var. densata): 20 to 40 feet high and 10 to 20 feet wide, very narrow, dense form, slow growing. Good for space restrictions, screen or windbreak.