UPDATE 3/11/2020: As we are classed as a Garden Center we will continue to operate as normal. We are still able to deliver, the nursery will be open for buying and viewing stock and planting service will also continue as normal.

Korean Rowan SORBUS ULLEUNGENSIS OLYMPIC FLAME

Description & features

British Grown - The British Grown logo denotes plants and trees that have been both propagated and grown in the UK. Read more

Select plant type

Bare root guide

Size and quantity

Photo
Size / Height
Price
Quantity
 
80L pot size / 3.0-4.5m
£300.00

All prices include VAT

All prices include VAT

All prices include VAT

All prices include VAT

British Grown - The British Grown logo denotes plants and trees that have been both propagated and grown in the UK. Read more

Product description

SORBUS ULLEUNGENSIS OLYMPIC FLAME - Korean Rowan

Characteristics

The Korean Rowan packs some serious punch in autumn with its incredible, heavy bunches of large, orange-red berries. The varietal name, Olympic Flame, is inspired by the upright shape of the tree, which turns ablaze with fiery colours.

It will make a medium-size tree, initially with narrow oval crown, eventually with an ovoid crown to 10m (30ft) tall and 6m (20ft) wide. The leaves are large, 15 to 20 cm (6 to 8 ins) long with generally 15 leaflets per leaf.  Flowers clusters are white.

This is a fairly recent introduction with an interesting taxonomic history, see below. It is sometimes known as Sorbus commixta Olympic Flame.

Where to grow

Rowans are hardy and will grow in most soil types but dislike thin soils over chalk. Full sun is best with room for this tree to reach its full potential. 

Did you know? 

Ulleung Island, a volcanic, pentagonally shaped island about 10 km in diameter, is located about 150 km from the Korean mainland. The island, formed during the late Tertiary period and surrounded by rocky cliffs, is well known for its unique flora numbering about 180 woody species, including several endemic. The one species of Sorbus on Ulleung Island has long been thought of as Sorbus commixta. However during a Swedish/Danish expedition to Ulleung Island in 1976, questions were raised of its status due to the large size of most of its morphological characters. They called a clone of the Ulleung rowan Dodong (after the ferry terminal on Ulleung) and propagated and distributed it in Europe.  

Olympic Flame was a rebranding of the clone in honour of the London Olympics in 2012.  It seems probable that Sorbus commixta Dodong and Sorbus Olympic flame and all variations on these names refer to the same species of Sorbus, Sorbus Ulleungensis

Source: Chin-Sung Chang and Hee Young Gil, 2014. "Sorbus ulleungensis, a new endemic species on Ulleung Island, Korea", Harvard Papers in Botany Vol. 19, No. 2.

Features

Mature height
Small - 5-10 metres
Spread
5-10 metres
Shape / habit
Vase
Growth rate
Medium
Soil type
All soil types
Sun levels
Full sun
Difficulty / hard to grow
Easy
Evergreen / Deciduous
Deciduous
Season of interest
Autumn
Spring
Autumn colour
Orange
Red
Foliage
Fine/Light leaf
Large Leaves
Flower colour
White
Flowering month
May
Berries / fruit colour
Red
Uses
Garden Tree
Encourages wildlife

Features

Mature height
Small - 5-10 metres
Spread
5-10 metres
Shape / habit
Vase
Growth rate
Medium
Soil type
All soil types
Sun levels
Full sun
Difficulty / hard to grow
Easy
Evergreen / Deciduous
Deciduous
Season of interest
Autumn
Spring
Autumn colour
Orange
Red
Foliage
Fine/Light leaf
Large Leaves
Flower colour
White
Flowering month
May
Berries / fruit colour
Red
Uses
Garden Tree
Encourages wildlife

Aftercare

For the continued healthy growth of your trees, shrubs or hedging it is vital that you follow the advice below.

Watering

The main reason that plants die within 12 months of having been planted is lack of water.  It is essential throughout the spring and summer, to give a heavy enough watering to enable the water to penetrate right down to the deepest root level of the tree.  In hot dry spells give the equivalent of 2 bucketfuls every three days.

Weed Control

One of the most common causes of lack of water is competition from grass.  When trees are first establishing, the grass roots would be at the same level as the tree roots and are far more efficient at taking up water and thus choke the tree.  It is vital for 3 years after planting that your tree or hedge has a circle or strip one  metre wide completely free of grass.  The way to eliminate grass in order of effectiveness is:

  1. Spray off the grass with a glyphosate based weed killer such as Roundup.  Apply each year for the first 3 years.  It is best applied when the tree is dormant as it is absorbed through green leaves and kills the plant off at the roots.
  2. Firmly fit a mulch mat around the base of the tree by tucking the edges into the soil and put a thick layer of bark mulch on top of this.  This can be done after the initial spraying with glyphosate and should avoid the need for further spraying.

Mowing or strimming is NOT an answer to the problem.  Each time you mow, the grass will grow back more vigorously and strimming invariably leads to lacerated trunks.

Staking

If trees are not correctly secured they will rock in the planting pit. Roots not firmly in contact with the soil are unable to take up moisture and nutrients, resulting in die back or death of the tree.  Check, particularly after windy weather, that stakes are still solidly in the ground keeping the base of the trunk firm.  The purpose of the stakes is to anchor the roots.   Flexing in the wind, higher up the trunk, is not necessarily a problem if the roots are firm.

Bellow is list of the correct system to use to secure your trees.

  • 40/60, 60/80, 80/100 whips - Unless rabbit/deer problem no need to stake.
  • 100/125, 125/150  1.2m Cane and Easi tie.
  • 150/175  1.2m square stake and a buckle tie and spacer.
  • 175/250, 6/8, 8/10 15L 1.65 Tree stake and a buckle tie and spacer.
  • All larger trees. 2 x 1.65 Tree stake and cross rail with 38mm cushion spacer and 1m of 38mm strapping.

Ties

Always use our recommended tree ties or strapping.  These are designed and manufactured with the correct amount of give to hold the tree firm without strangling it. They should be checked at the end of each growing season for adjustment as the trunk thickens.  Non proprietary materials such as baler twine will cut into the bark and should not be used.

Protection from Animal Damage

Rabbits, deer, sheep, cattle and horses can all potentially damage trees.  Ask us for advice on the most appropriate guards for your trees or hedge.  Squirrels are also a terrible pest when trees get to about 20ft tall but there is no protection available.


Comments

There are no comments for this yet.

Reviews, Comments and Questions

Your data will be used to display your comment, get in touch if you'd like to edit/remove it. You can find out more details in our Privacy Policy.