DescriptionPlanting InstructionsAfter CareDelivery & Guarantee
Sessile / Durmast Oak Trees - Large Standards - Delivered by Mail Order from the Nursery with a 1 Year Guarantee
The Sessile Oak tree, Quercus petraea, is a native tree that is closely related to Common Oak. It looks very similar, with slightly more upright branches. It will grow in most soils with decent drainage, apart from chalk, and it does well on rocky terrain.
Sessile Oak trees can reach a height of about 30-40 metres.
Standard trees are the largest size that we deliver; you can also buy younger Sessile Oak saplings here.
Browse all of our other varieties of Oak here.
How Standard Trees are Measured:
All the plants in the ornamental trees section are graded as standards, which means that they are measured by their girth in centimetres 1 metre above ground level (basically, their trunk's waist measurement). They aren't measured by their height, which will vary. So, a 6/8 standard has a trunk with a circumference of 6-8 centimetres and an 8/10 standard has a trunk 8-10 centimetres around.
This measurement makes no difference to the tree's final height.
Standard trees are 2 - 3.5 metres tall (on average) when they arrive; they are the most mature trees that you can buy from us. We cannot tell you precisely how tall your trees will be before we deliver them.
General description of Sessile Oak trees:
Common Names: Welsh Oak, Sessile Oak, Durmast Oak
Botanical Names: Quercus petraea, Quercus sessiliflora
Sessile Oak grows in most of the same places as Common Oak; Common Oak tends to be more common on fertile lowland sites, whereas Sessile Oak is more adapted to rocky hillsides with better drainage. It is a shade tolerant tree, especially when it is young, and it is often interplanted with fast growing conifers. It won't grow on chalk.
Sessile oak is a stout, slow growing tree with a broad canopy and dark green leaves. It is hard to tell it apart from Common Oak: the surest sign is that this tree's acorns have very short stalks, whereas Common Oak acorns have stalks about an inch long. Sessile oak is usually more upright, with a narrower canopy, but this isn't always a sure sign because trees in exposed locations can be shaped by the wind.
This tree is listed as being resistant to honey fungus.
History & uses of Quercus petraea
Sessile Oak is a good timber tree and it is commonly used for high quality casks and barrels because the wood is water resistant and gives a good flavour to the beverages stored in it. The acorns are excellent feed for pigs and also attract jays.
Notes on planting Sessile Oak trees:
Sessile Oak trees will grow well in most conditions. It tolerates shade, damp sites (as long as they aren't prone to waterlogging) and although it prefers a deep, slightly acidic loam, it will grow well on any terrain that isn't too alkaline. It is a great tree for exposed, rocky hillsides with high rainfall.
If your site is lowland, heavy clay, we recommend Common Oak instead.
It won't grow on chalk.
Prepare your site before planting:
It is good to dig over the site where you plant a tree several months in advance. Kill the weeds first: for tough weeds like nettles, brambles and ground elder, you will usually need a glyphosate based weed-killer to get rid of them. When you dig the soil over, remove stones and other rubbish and mix in well rotted compost or manure down to the depth of about 2 spades.
Watch our video on how to plant a tree for full instructions.
Remember to water establishing trees during dry weather for at least a year after planting.
Tree Planting accessories:
Prepare your site for planting by killing the weeds and grass with Roundup weed killer.
You can buy a tree planting pack with a wooden stake & rubber tie to support the tree and a mulch mat with pegs to protect the soil around the base of your tree from weeds and drying out.
We suggest that you use mycorrhizal "friendly fungi" on the roots of all newly planted large trees: if your soil quality is poor, we strongly recommend it.
You can also improve your soil with bonemeal organic fertiliser and Growmore.
After you plant a tree, the most important thing to do is water it in dry weather. You will also need to weed around the plants. Watering should be thorough, so the ground is soaked. Let the soil almost dry out before watering again. Watering & weeding will be necessary for at least a year after planting.
If your trees do need pruning, it is ideal to do this in winter. Always hire a tree surgeon to remove large branches.
Special notes on caring for Sessile Oak trees:
Sessile Oak is a very tough tree that shouldn't need special attention once it has established. Remember to check the stake and tie supporting your trees a few times a year. Tighten the tie if it becomes loose and loosen it as the tree grows. Make sure that the tree's trunk isn't rubbing against the stake.
Hygiene & Diseases:
Dead, damaged or diseased wood can be pruned off as soon as it appears.
Disinfect your pruning tools between every cut if there is any sign of disease.
Burn or dispose of any diseased material, do not compost it.
Read our full terms and conditions here.
Delivery: Any order with a standard sized tree in it has a basic delivery charge of £6.50 + vat.
Because couriers sometimes experience delays, we schedule delivery by week, not by day. Therefore, please plan your planting day for the weekend at the end of the delivery week or for the week following delivery, at the earliest.
You can choose the delivery week that suits you during checkout and we will email you the day before your plants are due to arrive.
Payment: We do not charge your card until we begin to prepare your order for packing.
Guarantee: If any plants die within a year, we will replace them. We only ask that you follow our planting & growing instructions and sent us clear photographs of the dead plants in situ, so we can help to make sure that the replacement plants succeed. You only pay for the delivery of the replacements.
Please note that our guarantee is void if there is a hosepipe ban in your area: your newly planted trees must be watered in dry weather while they are establishing. The best way to water is very thoroughly every few days: at least once a week if there is no heavy rain.
Our nursery has been supplying large ornamental trees to gardeners since 1949. Our website started in 2003, so we do understand the concerns that you may have about buying specimen trees online. If any of your plants are damaged when they arrive or if you are otherwise not satisfied with your order after you inspect it, please repackage it and contact us. We will give you a refund or send replacements and send a courier to come and collect the unwanted plants.
Your 12 Month Guarantee
If any of the plants that you buy from our nursery die within a year of delivery, we will replace them.
You only pay for the delivery of the replacements.
We do ask for clear photos of the plants in the soil, both taking in the planting area and close up. These will help us to work out what went wrong so we can give you the right advice for looking after your replacements.
The most important thing to do with establishing plants is to water them in dry weather. Water very thoroughly, but not too frequently: allow the top 2 inches of soil to dry out before you water again. In hot summer weather, this should mean that you are watering 1 to 3 times per week, depending on your site's drainage and exposure to wind and sun.
If there is heavy rain, that counts as a watering for your plants. If there is only very light rain during hot weather, this probably won't be of much use to your plants and they will still need watering.
Weeding is also very important; we strongly recommend using a mulch mat (for trees) or mulch fabric (for hedges) if weeding your new plants will be impractical.
Outside your 1 Year Guarantee period?
If your plants die or get sick after their first year, you are still welcome to take some photos and send them in: we will still be happy to give you what advice we can.
We can't make any promises, but if you want to buy replacements from us, give us a call and we'll see if we can arrange a discount for you.
Place an order for £250 excluding VAT and delivery and we deliver it for FREE!
Bare-root Plants are only delivered in the winter season, from November to April. Pot grown plants can be delivered all year round
Advantages of Bare-root plants:
You pay less for the same size plants.
You can carry and plan them easily.
You only plant them in winter, so they need less maintenance after
planting. The rain will water them for their first few months.
You get the biggest selection: Many trees are not sold pot-grown.
They are "asleep" in winter - this is the best time to transplant any tree.
They use fewer fertilisers & fungicides, less water and fuel in their production & delivery.
Advantages of Pot Grown plants:
Pot grown plants can be delivered & planted all year round.
Plants with tender roots & larger specimens must be delivered in pots.
Plants in pots can be kept for months longer if there is a delay in planting.
Our Advice to You:
If you can't wait to get planting, order Pot grown plants now.
If you are not in a hurry, order bare-root plants for delivery this winter. Simply add them to your basket and choose a winter delivery date that suits you during checkout.
This will reserve your plants before they sell out.
We won't charge you until the day before delivery, so cancelling your order is always easy.
If you are only ordering chemicals and other small items, delivery is £3.50
Our delivery charge for all other orders is £6.50 + VAT.
If you live in the Scottish Highlands or the Isle of Wight, there will be an extra charge of £15 + VAT on top of the appropriate basic charge, as listed above.
If your order is over £250 exc. VAT, there will be no delivery charge.
If you are uncertain, just add items to your basket which will calculate the basic shipping charge for you.
