Birch, Rocky Mountain/Water
Betula occidentalis
Birch, Rocky Mountain/Water (Betula occidentalis) is a Colorado-native tree suited to the Colorado Front Range, rated "Conditionally Recommended" on the 2024 Front Range Tree Recommendation List. It matures to about 15–25 ft tall and 15–25 ft wide, fast-growing, needs medium to high water, and prefers full sun to partial shade. Best as a multi-stem.
Colorado nativemedium to high water15–25 ft tall and 15–25 ft wide
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At a glance
- Rating
- Right spot only (FRTRL: Conditionally Recommended)
- Botanical name
- Betula occidentalis
- Variety / cultivar
- Rocky Mountain/Water
- Type
- Tree
- Mature size
- 15–25 ft tall and 15–25 ft wide
- Mature form
- Oval / upright
- Spacing / clearance
- ~25 ft of clearance
- Hardiness zones
- USDA 3–7
- Growth rate
- Fast
- Lifespan
- Short-lived
- Fall color
- Gold, yellow
- Water needs
- medium to high water
- Sun
- Best in full sun; tolerates partial shade.
- Colorado native
- Yes
- Foliage
- Deciduous
- Soil
- clay, loam
- Soil pH
- 6.0–8.2
- Hail tolerance
- moderate
- Wind tolerance
- moderate
- Salt tolerance
- moderate
- Pollinator value
- low
Site factors to consider
- Critical: Insects & DiseasesMain pressure here is Bronze birch borer and Birch leafminer, so keep it vigorous with steady water and a well-chosen site.
- Watch: Short LivedFast but not forever; this one runs short lived here, so enjoy it and plan a successor rather than treating it as a legacy tree.
Wildlife & ecology
- Pollinator value
- low
- Native ecoregion
- riparian, foothills
Common problems on the Front Range
- Bronze birch borer (stress-driven, keep well watered)
- Birch leafminer
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 Birch, Rocky Mountain/Water good for the Colorado Front Range?
- Yes, Birch, Rocky Mountain/Water is a well-suited tree for Colorado's Front Range, rated "Conditionally Recommended" on the 2024 Front Range Tree Recommendation List.
- Why is Birch, Rocky Mountain/Water only conditionally recommended on the Front Range?
- The main catches here: Main pressure here is Bronze birch borer and Birch leafminer, so keep it vigorous with steady water and a well-chosen site.
- How big does Birch, Rocky Mountain/Water get?
- It matures to about 15–25 ft tall and 15–25 ft wide.
- How much room does Birch, Rocky Mountain/Water need?
- Give Birch, Rocky Mountain/Water about 25 ft of clearance from buildings, fences, and other trees so the mature canopy isn't crowded.
- What shape does Birch, Rocky Mountain/Water grow into?
- Birch, Rocky Mountain/Water typically grows into an upright-oval crown, taller than it is wide. This is the species' usual mature form, named cultivars (columnar, weeping, or compact selections) can differ, so check the specific cultivar.
- Is Birch, Rocky Mountain/Water hardy on the Front Range?
- Birch, Rocky Mountain/Water is hardy in USDA 3–7. The Colorado Front Range spans roughly USDA 4b–6a, so it is well within range.
- How much water does Birch, Rocky Mountain/Water need?
- It needs medium to high water once established.
- How fast does Birch, Rocky Mountain/Water grow?
- Birch, Rocky Mountain/Water is a fast-growing tree. Growth rate depends on water and site conditions on the Front Range.
- How long does Birch, Rocky Mountain/Water live?
- Birch, Rocky Mountain/Water is relatively short-lived for a tree, so plan to replace it sooner than a long-lived shade tree. Actual lifespan varies with site, water, and care.
- What color does Birch, Rocky Mountain/Water turn in fall?
- Birch, Rocky Mountain/Water turns gold and yellow in autumn. Fall color intensity varies with the season and site on the Front Range.
- Is Birch, Rocky Mountain/Water native to Colorado?
- Yes. It is a Colorado native.
- Is Birch, Rocky Mountain/Water prone to pests or disease on the Front Range?
- Birch, Rocky Mountain/Water can be affected by bronze birch borer (stress-driven 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.
