Photo: Heath Cajandig — CC BY 2.0 · source
2
3
4
5
6
7
8
9
Survives zone 3 through 8
Acorns edible only after leaching out bitter tannins in water, then ground into flour or roasted. Bur oak is in the low-tannin white-oak group and among the easiest, sweetest acorns.
- Hardiness
- Zone 3 to 8
- Habit
- Tree
- Edible part
- Fruit
- Ripens
- Sept–Oct
- Mature size
- Large tree — NOT containerable
- Light
- Full sun — acorn masting needs a sunlit crown
- Soil pH
- Castanea 4.5–6.5 — ⚠ LIME-INTOLERANT (calcifuge, unlike other nut trees). Quercus/Fagus 5.0–6.5
- Environment
- Temperate
- Status
- Wild
- Years to fruit
- 3–5 yrs grafted
- Pollination
- Wind-pollinated, monoecious; masting (heavy crops every 2–4 years) — several trees improve pollination