Gambel Oak
Quercus gambelii
Gambel Oak (Quercus gambelii) is a Colorado-native tree suited to the Colorado Front Range, rated "Recommended" on the 2024 Front Range Tree Recommendation List. It matures to about 15–30 ft tall and 15–30 ft wide, slow-growing, needs low water, and prefers full sun to partial shade. Shrubby habit; susceptible to galls.
Colorado nativelow water15–30 ft tall and 15–30 ft wideXeric / water-wiseZones 2–3 (keep it back from the house)
Photos
- Photo 1: (c) Lyrae, some rights reserved (CC BY)
- Photo 2: "Quercus gambelii" by amywashuta is marked with CC0 1.0. To view the terms, visit https://creativecommons.org/publicdomain/zero/1.0/.
- Photo 3: "Quercus gambelii" by amywashuta is licensed under CC BY 2.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/2.0/.
- Photo 4: "Quercus gambelii" by Jacob Saucier is licensed under CC BY 4.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Photo 5: "Quercus gambelii" by charlie is licensed under CC BY 4.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/.
- Photo 6: (unknown)
At a glance
Will it survive here?
- Hardiness zones
- USDA 3–8
- Water needs
- low water
- Sun
- Best in full sun; tolerates partial shade.
- Soil
- clay, loam, sandy
- Soil pH
- 6.0–8.2
- Hail tolerance
- moderate
- Wind tolerance
- high
- Salt tolerance
- moderate
- Firewise (defensible space)
- Zones 2–3 (keep it back from the house)
- Tolerates
- Slopes & erosion control, Hot south- or west-facing walls
How big, what shape?
- Mature size
- 15–30 ft tall and 15–30 ft wide
- Mature form
- Rounded
- Spacing / clearance
- ~30 ft of clearance
- Growth rate
- Slow
- Lifespan
- Long-lived
What it looks like, and when
- Fall color
- Bronze, red
- Foliage
- Deciduous
Who else benefits
- Pollinator value
- low
- Deer
- Not deer-resistant
- Colorado native
- Yes
- Native ecoregion
- foothills
Site factors to consider
- Critical: Cold HardinessThe average low suits it fine; our real cold risk is the swings, late frosts, and intense winter sun, so wrap young trunks and give it shelter.
- Watch: SuckersIt throws up shoots from the roots and base, so plan on cutting suckers to keep it from turning into a thicket.
Common problems on the Front Range
No major pest or disease problems are commonly reported for this plant on the Front Range. Keep it well sited and watered, and watch for the usual stress-driven issues in drought or heat.
Planting & establishment
Water deeply every 7–10 days through the first 2 summers. Winter water 1–2×/month October–March when soil is dry and unfrozen, winter desiccation is a top killer of newly-planted trees. Year 3: taper to 2×/month in summer, then rely on natural precipitation.
Frequently asked questions
- Is Gambel Oak good for the Colorado Front Range?
- Yes, Gambel Oak is a well-suited tree for Colorado's Front Range, rated "Recommended" on the 2024 Front Range Tree Recommendation List.
- How big does Gambel Oak get?
- It matures to about 15–30 ft tall and 15–30 ft wide.
- How much room does Gambel Oak need?
- Give Gambel Oak about 30 ft of clearance from buildings, fences, and other trees so the mature canopy isn't crowded.
- What shape does Gambel Oak grow into?
- Gambel Oak typically grows into a broad, rounded crown, the classic shade-tree silhouette. This is the species' usual mature form, named cultivars (columnar, weeping, or compact selections) can differ, so check the specific cultivar.
- Is Gambel Oak hardy on the Front Range?
- Gambel Oak is hardy in USDA 3–8. The Colorado Front Range spans roughly USDA 4b–6a, so it is well within range. That said, it carries a cold-hardiness caution: The average low suits it fine; our real cold risk is the swings, late frosts, and intense winter sun, so wrap young trunks and give it shelter.
- How much water does Gambel Oak need?
- It needs low water once established.
- How fast does Gambel Oak grow?
- Gambel Oak is a slow-growing tree. Growth rate depends on water and site conditions on the Front Range.
- How long does Gambel Oak live?
- Gambel Oak is long-lived, a multi-generational tree given good siting and care. Actual lifespan varies with site, water, and care.
- What color does Gambel Oak turn in fall?
- Gambel Oak turns bronze and red in autumn. Fall color intensity varies with the season and site on the Front Range.
- Is Gambel Oak native to Colorado?
- Yes. It is a Colorado native.
- Is Gambel Oak deer-resistant?
- No. Gambel Oak is not considered deer-resistant and may need protection where deer browse.
- Is Gambel Oak a good firewise plant near the house?
- Gambel Oak is suitable in defensible-space zones 2–3, best kept back from the house rather than in the area right against the structure. This is general suitability guidance based on CSU Extension firewise plant lists, 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 Gambel Oak prone to pests or disease on the Front Range?
- Gambel Oak has no major pest or disease problems commonly reported on the Front Range. Keep it well sited and watered, and watch for stress-driven issues in drought or heat.
