Engelmann Spruce
Picea engelmannii
Engelmann Spruce (Picea engelmannii) is a Colorado-native tree suited to the Colorado Front Range, rated "Recommended for Most Sites" on the 2024 Front Range Tree Recommendation List. It matures to about 40 to 60 ft tall and 20 to 30 ft wide, slow-growing, needs medium to high water, and prefers full sun to partial shade.
Colorado nativemedium to high water40 to 60 ft tall and 20 to 30 ft wide
At a glance
Will it survive here?
- Hardiness zones
- USDA 2 to 6
- Water needs
- medium to high water
- Sun
- Best in full sun; tolerates partial shade.
- Soil
- clay, loam, sandy
- Soil pH
- 6.0 to 8.2
- Hail tolerance
- high
- Wind tolerance
- high
- Salt tolerance
- moderate
- Tolerates
- Cool north foundations
How big, what shape?
- Mature size
- 40 to 60 ft tall and 20 to 30 ft wide
- Mature form
- Pyramidal
- Spacing / clearance
- ~30 ft of clearance
- Growth rate
- Slow
- Lifespan
- Long-lived
What it looks like, and when
- Foliage
- Evergreen
Who else benefits
- Pollinator value
- low
- Deer
- Not rated
- Colorado native
- Yes
- Native ecoregion
- montane
Also worth knowing
- Fire rating
- Ignitable (CSU): keep 30+ ft from the house, thinned
Common problems on the Front Range
- Spruce ips beetle in stressed trees
- Spruce spider mite on hot, dry sites
- Cytospora canker on lower branches
These are general tendencies for this group of plants on the Front Range, not a diagnosis. Many are stress-driven and preventable with good siting and watering. For a specific plant or an active problem, consult a certified arborist or your local CSU Extension office.
Frequently asked questions
- Is Engelmann Spruce good for the Colorado Front Range?
- Yes, Engelmann Spruce is a well-suited tree for Colorado's Front Range, rated "Recommended for Most Sites" on the 2024 Front Range Tree Recommendation List.
- How big does Engelmann Spruce get?
- It matures to about 40 to 60 ft tall and 20 to 30 ft wide.
- How much room does Engelmann Spruce need?
- Give Engelmann Spruce about 30 ft of clearance from buildings, fences, and other trees so the mature canopy isn't crowded.
- What shape does Engelmann Spruce grow into?
- Engelmann Spruce typically grows into a pyramidal, conical outline that is widest at the base. This is the species' usual mature form, named cultivars (columnar, weeping, or compact selections) can differ, so check the specific cultivar.
- Is Engelmann Spruce hardy on the Front Range?
- Engelmann Spruce is hardy in USDA 2 to 6. The Colorado Front Range spans roughly USDA 4b to 6a, so it is well within range.
- How much water does Engelmann Spruce need?
- It needs medium to high water once established.
- How fast does Engelmann Spruce grow?
- Engelmann Spruce is a slow-growing tree. Growth rate depends on water and site conditions on the Front Range.
- How long does Engelmann Spruce live?
- Engelmann Spruce is long-lived, a multi-generational tree given good siting and care. Actual lifespan varies with site, water, and care.
- Is Engelmann Spruce native to Colorado?
- Yes. It is a Colorado native.
- Is Engelmann Spruce a good firewise plant near the house?
- Engelmann Spruce is listed by CSU Extension among the more ignitable plants, so keep it 30 or more feet from the house and keep it thinned and well maintained. This is general guidance based on CSU Extension Fact Sheet 6.305 (2025), not a guarantee that any plant won't burn, a well-irrigated, well-maintained plant is the goal. Follow CSU Extension defensible-space guidance and check with your local fire district before planting in the wildland-urban interface.
- Is Engelmann Spruce prone to pests or disease on the Front Range?
- Engelmann Spruce can be affected by spruce ips beetle in stressed trees and other issues common to this group on the Front Range. These are general tendencies, not a diagnosis, many are stress-driven and preventable with good siting and watering. For a specific plant or an active problem, consult a certified arborist or CSU Extension.
