Plants by mail order since 1984, over 4100 plants online today
Nursery & Gardens open: Mon - Sat 8:30 - 17:00 & Sun 10:00 - 16:00
Pop up café: open weather dependent
- Shop Now
- Burncoose Specialities
- This Month
- Offers & Promotions
- RHS Chelsea Flower Show 2024
- 40 years at Burncoose
- Engage With Us
- Information, Help & Advice
- About Us & Our Services
- Terms & Conditions
- Log In / Register
![](https://www.burncoose.co.uk/site/img/artwork/badges/new.96.png)
QUERCUS petraea
Commonly known as Cornish oak, durmast oak, Irish oak, sessile oak, Welsh oak
(syn. Q. sessiliflora). Lobed dark green leaves.
-
DeciduousYellow-stalked, dark green leaves 6-17cm (2½-6¾in) long with rounded lobes
-
Height30m (100ft)
-
Spread25m (80ft)
-
TreeSpreading tree with ridged, grey bark. Produces stalkless, ovoid to oblong-ovoid acorns singly or in clusters
-
Very hardyHardy in the severest continental climates including exposed upland locations in the UK. Plant can withstand temperatures < -20 (-4°F)
-
Full sun
-
Partial shade
QUERCUS petraea
-
Additional FeaturesGood to knowWildlife plant. Habitat for more than 257 species of insect. Mature trees provide nesting cavities for birds and mammals and birds are attracted to the acornsPests & DiseasesAphids, gall wasps, oak wilt, honey fungus, powdery mildewPlace of originEurope
-
Garden Location/ConditionsWoodland garden
-
HardinessFully hardy
-
Leaf marginLobed
(see photos above) -
Leaf shapeOblong
(see photos above) Obovate(see photos above) Ovate(see photos above) -
Pruning groupPruning group 1Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.
-
Seasonal InterestAutumnSpringSummer
-
Soil ConditionsFertile moist well-drained soil
-
Toxic - Category CHarmful if eatenpets, i.e. cats, dogs, rabbits, rodents, notably dogs
-
Tree ShapeRounded to broadly spreading
-
WildlifeBee friendlyBird friendlyButterfly friendly
30m (100ft)
|
![]() |
![]() |
25m (80ft) |
Useful extras...
![](https://www.burncoose.co.uk/site/img/products/squaremedium/Vitax_Q4_6202.jpg)
Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00
![](https://www.burncoose.co.uk/site/img/products/squaremedium/rootgrow_6203.jpg)
Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
3 options from £3.00
![](https://www.burncoose.co.uk/site/img/products/squaremedium/empathy-allpurpose_6208.jpg)
Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50
![](https://www.burncoose.co.uk/site/img/products/squaremedium/Carbon+Gold+Biochar.jpg)
Fertilisers & Feeds - Carbon Gold
Biochar soil improver
Biochar is a carbon rich form of charcoal specifically designed for soil application to improve plant growth and health. Biochar is a very stable substance that is not broken down in soils, offering long-term soil benefits.
Only £8.00
![](https://www.burncoose.co.uk/site/img/products/squaremedium/slate_label_6218.jpg)
Garden Goodies
Slate Plant Labels
These wonderfully tactile natural slate plant labels are hand made in Cornwall and come with a chalk pen.
Just stick them in your pot or border. Pack of 6.
Only £10.00
![](https://www.burncoose.co.uk/site/img/products/squaremedium/slate_tie_6219.jpg)
Garden Goodies
Slate Tie-on Plant Labels
Hand made in Cornwall, these delightful natural slate labels are perfect for pots.
Comes with chalk pen. Pack of 5
Only £10.00