Blue oak
5
3
7Will it grow where I live?
Blue oak is hardy to zone 7: lowlands, river valleys and cities across Central Europe are fine, harsher continental or upland sites need winter protection or a container.
Or check it for your location right here:
Profile
- Family
- Fagaceae
- Habit
- Tree
- Height
- 12 m
- Spread
- 9.1 m
- Growth
- very slow
- Lifespan
- 300 years
- First yield
- after 20 years
- Hardiness
- zone 7–11
- Shade tolerance
- partial shade
- Soil
- Silt, Loam
- Soil moisture
- dry – moist
- pH
- 6 – 7.8
Uses
Frequently asked questions
Blue oak: how big does it get?
Blue oak (Quercus douglasii) grows as a Tree and reaches roughly 12 m in height when mature, with a spread of about 9.1 m. Growth is very slow.
Blue oak: what site does it need?
Blue oak tolerates partial shade. Suitable soils are Silt, Loam. Soil moisture should be in the range dry – moist. The pH may lie between 6 and 7.8.
Blue oak: is it hardy?
Blue oak is listed as hardy in zone 7–11 and survives normal winters outdoors there.
Blue oak: will it grow in Central Europe?
Blue oak is hardy to zone 7: lowlands, river valleys and cities across Central Europe are fine, harsher continental or upland sites need winter protection or a container.
Blue oak: is it poisonous?
No toxicity is recorded for Blue oak. With wild plants, never rely on a database alone — only on a confident identification.
Blue oak: what is it used for?
Rated on a scale up to 10: Edible 5/10, Medicinal 3/10, Other uses 7/10.
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Community experience
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