Overview
Quercus kelloggii is a spreading branched, bushy trees in the genus Quercus, part of the Fagaceae family, with deciduous, evergreen foliage. Quercus kelloggii grows best in full sun, and tolerates loam and sand soils and any pH. Its UK hardiness is rated H6. Suggested uses include architectural and low maintenance. It is native to California, Mexico Northwest and Oregon.
About
Quercus kelloggii, known as Californian black oak, is a spreading branched, bushy tree within the Quercus genus, which includes both deciduous and evergreen trees or shrubs. This deciduous species thrives in full sun and can be grown in a variety of soil types, including loam and sand, with well-drained conditions. It is hardy to UK zone H6 and is suitable for architectural planting and low-maintenance gardens. Native to California, Mexico Northwest, and Oregon, it offers seasonal interest in winter and can be propagated by seed or cuttings.
About the genus
An oak is a hardwood tree or shrub in the genus Quercus of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup.
Growing conditions
Best soil and position for Quercus
- Sunlight
- Full sun
- Soil type
- Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- North-facing, South-facing, East-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H6
Plant details
Quercus kelloggii size, habit and characteristics
- Plant type
- Trees
- Habit
- Spreading branched, Bushy
- Foliage
- Deciduous, Evergreen
- Suggested uses
- Architectural, Low Maintenance
- Native to
- California, Mexico Northwest, Oregon
Care notes
Pruning and caring for Quercus kelloggii
- Propagation
- Seed, Semi-ripe cuttings, Hardwood cuttings
- Pest resistance
- Oak processionary moth, Aphids, Caterpillars, Leaf-mining moths, Oak gall wasps
- Disease resistance
- Powdery mildews, Honey fungus
Frequently asked questions
Where is the best place to plant Quercus kelloggii?
Quercus kelloggii prefers full sun. It suits exposed and sheltered positions.
What soil does Quercus kelloggii need?
Quercus kelloggii grows best in loam and sand soil. It is happy in soil of any pH. Aim for soil that stays well-drained.
Is Quercus kelloggii hardy in the UK?
Quercus kelloggii has an RHS hardiness rating of H6, meaning it is very hardy, tolerating -20 to -15°C across most of the UK.
How do I propagate Quercus kelloggii?
Seed, Semi-ripe cuttings, Hardwood cuttings.
More in the Quercus genus
- Quercus acutissimaJapanese silkworm oak
- Quercus aucheriboz pirnal oak
- Quercus cerris 'Afyon Lace'Turkey oak 'Afyon Lace'
- Quercus chrysolepismaul oak
- Quercus frainetto 'Tortworth'
- Quercus gambeliiGambel oak
- Quercus garryanaOregon white oak
- Quercus georgianaGeorgia oak
