Quercus petraea
Sessile oak, Durmast oak
Also known as Quercus sessiliflora
- Height × spread
- 30m × 20m
- Position
- Full sun
- Hardiness
- Very cold to -20C (RHS H6)
- Flowers
- Autumn
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is a native oak, perhaps the less well known one. It is more suited than the common oak for damp conditions. It has more ascending branches than the common oak, Quercus robur, which tends to be not so tall achieving 37m (120ft) whereas the sessile oak can reach 40m (130ft) height. The acorns of the sessile oak are clustered against the twig, whereas those of Quercus robur are on long stalks. Quercus petraea tends to grows in more acidic conditions. To confuse things even more, it will readily hybridize with Quercus robur.
- Foliage colour
- Green
- Autumn foliage
- Yellow
- Stem colour
- Grey
- Variegated
- No
- Scent
- No
- Shape
- Bell
- Height
- 30m
- Spread
- 20m
- Height in 10 years
- 7m
- Spread in 10 years
- 5m
- Season of interest
- Autumn
- Flowers in
- Autumn
- Evergreen
- Deciduous
- Garden style
- Seaside garden
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Clay, Loam (normal), Sandy soil
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil
- Hardiness
- Very cold to -20C (RHS H6)
- Borders & containers
- Borders
- Use for
- Hedge, Architectural, Bird attraction
- Maintenance
- Easycare – low/no maintenance
- Hazards
- No
Spring
Spring - late · Outdoors
Feed young plants with slow release fertiliser
Spread a slow release fertiliser around the base of the plant to the edge of the foliage spread, so that it can feed the roots. It is helpful for this to be applied for several years.
This is a simple way to provide a nutrient boost until the plant becomes well established.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Planting & general
Outdoor planting · Planting
Add root growth stimulant to the planting hole
Mycorrhizal fungi helps roots establish quickly, so they absorb water and nutrients more efficiently. It comes as a powder, granule or gel. Add to the planting hole or container, and to the plant's rootball before planting in the hole. For "bareroot" plants use a gel.
Planting
Protect & support young trees
Attach a newly planted tree or tall shrub over 1m to a tree stake to give support and prevent windrock. Use a tree guard to stop tree bark being eaten by animals, especially in areas with deer - removing bark injures a tree and in worst case can kill it.
Found in
More Quercus
Quercus robur
Common oak, English oak, Pedunculate oak
Quercus
Oak
Quercus alnifolia
Golden oak of cypress, Golden oak
Quercus cerris
Turkey oak, Bitter oak
Quercus cerris
Turkey oak, Bitter oak
Quercus cerris 'Argenteovariegata'
Variegated turkey oak, Mossy oak, Moss-cupped oak
Quercus coccinea
Scarlet oak
Quercus coccinea
Scarlet oak