#237 most planted
Quercus ilex
Holm oak · also Holly oak, Evergreen oak
BroadleafEvergreen
6,864
trees mapped
0.07%
of all named trees
14
cities
7.5 in
median trunk (19 cm, 5,710 measured)
36 yr
median age (36% have a planting date)
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Quercus ilex is a large evergreen oak with a dense, rounded canopy that provides ample shade. It is well-suited for urban environments due to its high tolerance for drought and poor soil conditions, making it a reliable choice for parks and streetscapes. Its dark green, leathery leaves and deeply furrowed bark give it a rugged, ancient appearance.
Where it grows
Trees in each city's inventory, with the share of that city's named trees this species accounts for.
- 2,9510.26%—3.8 in
- 2,3520.50%36 yr15 in
- 1,2060.53%—6.9 in
- 1500.11%9.6 yr3.0 in
- 971.2%——
- 430.01%8.3 yr5.9 in
- 250.07%—3.1 in
- 140.00%—27 in
- 100.04%—1.0 in
- 70.01%—5.9 in
- 30.00%—3.1 in
- 30.00%—12 in
- 20.00%——
- 10.00%—6.8 in
Traits
- Form
- Broadleaf
- Foliage
- Evergreen
- Mature height
- 0–69 ft
- Canopy spread
- 40–70 ft
- Water needs
- Moderate
- Drought tolerance
- High
- Pollution tolerance
- High
- Wildlife value
- High
- Blooms
- Jan, Feb, Mar, Apr, Nov, Dec
Trunk diameters across every city: median 7.5 in, mean 8.8 in, 90th percentile 18 in. Measured at breast height, as published by each inventory.
Other Quercus in the catalogue
74 of the top 2,000 species are in this genus.
