English Oak
Quercus robur
English Oak (Quercus robur) is a tree suited to the Colorado Front Range, rated "Recommended for Most Sites" on the 2024 Front Range Tree Recommendation List. It matures to about 45–55 ft tall and 10–15 ft wide, slow-growing, needs low to medium water, and prefers full sun. Borer susceptibility, keep tree vigorous with regular deep watering.
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At a glance
- Rating
- Recommended for Most Sites
- Botanical name
- Quercus robur
- Variety / cultivar
- English 'Columnaris'
- Type
- Tree
- Mature size
- 45–55 ft tall and 10–15 ft wide
- Mature form
- Rounded
- Spacing / clearance
- ~15 ft of clearance
- Hardiness zones
- USDA 4–8
- Growth rate
- Slow
- Lifespan
- Long-lived
- Fall color
- Bronze, red
- Water needs
- low to medium water
- Sun
- Best in full sun.
- Colorado native
- No
- Foliage
- Deciduous
- Soil
- clay, loam, sandy
- Soil pH
- 6.0–8.2
- Hail tolerance
- moderate
- Wind tolerance
- moderate
- Salt tolerance
- low
- Pollinator value
- low
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.
- Critical: Salt ToleranceIt has low salt tolerance, so keep it back from de-iced sidewalks, roadsides, and softener runoff, where salt burns roots and leaf edges.
Wildlife & ecology
- Pollinator value
- low
- Deer
- Not deer-resistant
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 English Oak good for the Colorado Front Range?
- Yes, English Oak 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 English Oak get?
- It matures to about 45–55 ft tall and 10–15 ft wide.
- How much room does English Oak need?
- Give English Oak about 15 ft of clearance from buildings, fences, and other trees so the mature canopy isn't crowded.
- What shape does English Oak grow into?
- English 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 English Oak hardy on the Front Range?
- English Oak is hardy in USDA 4–8. 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 English Oak need?
- It needs low to medium water once established.
- How fast does English Oak grow?
- English Oak is a slow-growing tree. Growth rate depends on water and site conditions on the Front Range.
- How long does English Oak live?
- English Oak is long-lived, a multi-generational tree given good siting and care. Actual lifespan varies with site, water, and care.
- What color does English Oak turn in fall?
- English Oak turns bronze and red in autumn. Fall color intensity varies with the season and site on the Front Range.
- Is English Oak native to Colorado?
- No. It is not a Colorado native, but it grows well on the Front Range.
- Is English Oak deer-resistant?
- No. English Oak is not considered deer-resistant and may need protection where deer browse.
- Is English Oak prone to pests or disease on the Front Range?
- English 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.
