Koster English oak
Quercus robur 'Koster'
RHS AGM 1993
USDA zones5 to 8
SunNeeds full sun (6+ hours)
WaterHandles moderate to moist soil
- Growth rate
- Moderate
- Habit
- Oval
- Bloom season
- Spring
- Soil types
- Sand, loam, clay
Garden uses
Attracts
Notes
'Koster' English oak (Quercus robur 'Koster') is a tree for specimen planting, woodland gardens, and low maintenance landscapes. It is hardy to USDA zone 5, or down to -20°F (-29°C). This plant likes full sun and average to moist, sandy, loamy, or clay soil. It grows in an oval shape at a moderate pace. Spring blooms draw butterflies, bees, and birds. Deer tend to pass it by.
Pairs well with Ohio buckeye, Feather reed grass, and Green and gold.