Shoot Logo
Take a photoPlans & pricingBook a demoGet started

Clematis 'M. Koster' (Clematis 'M. Koster')

Other names: Clematis 'Margot Koster', Clematis 'Margaret Koster', Clematis 'Marinus Koster', Clematis 'Monsieur Koster', Clematis 'Mr Koster', Viticella Group clematis 'M. Koster'

ShootChecker™

STOP: Make sure you get the “Right Plant, Right Place.”

90% of plants die because they were the wrong plant choice. Shoot helps you to save valuable time and money to get the right plant choices for any garden.

How ShootChecker™ works

Get the Right Plant, Right Place

1

Provide details about your garden or your client's garden conditions

2

ShootChecker™ will help you assess if it is the right plant

3

Save money with Right Plant, Right Place.

Get started Book a demo

Other Shoot features

Laptop, tablet and mobile devices

One-stop planning
Streamlined garden design and record-keeping all in one place

Monthly care advice
Receive tailored monthly care advice for plants in your garden

Present and collaborate
Share designs and care tasks with anyone

Join Shoot today to enjoy…

  • ShootChecker™
  • One-stop garden design
  • Monthly care advice for every plant in your garden
  • Saving money with Right Plant, Right Place

All you need to do is join.

Get started
Book a demo

Already a member? Sign in

Add to plant list
Variety or Cultivar
'M. Koster' is a deciduous, perennial climber with pinnate, mid- to dark green leaves and, from midsummer into early autumn, medium to large, rose-pink to reddish-purple flowers with paler bars down the centre of each petal and prominent, yellow-green anthers.
Add to plant list
ShootChecker™
Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
4 m 1 m 2-5 years
13 ft 3 ft 2-5 years

Where to grow

Soil type
  • Chalky
  • Clay
  • Loamy
  • Sandy
Soil drainage
  • Moist but well-drained
  • Well-drained
Soil pH
  • Alkaline
  • Neutral
Sunlight
  • Partial Shade
  • Full Sun
Aspect
  • East
  • West
  • South
  • North
Exposure
  • Exposed
  • Sheltered

Check to see if this is the Right Plant, Right Place with ShootChecker™

Open ShootChecker™

Additional plant details

Cultivation

Plant in fertile, well-drained soil (especially chalky soils) in full sun or partial shade. Plant root ball 8cm below soil surface. Shade roots and base. Mulch in late winter.

Suggested uses

Wallside and trellises

UK hardiness

H6

USDA zones

Zone 5, Zone 6, Zone 7, Zone 8, Zone 9

Sunset zone

A2, A3, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

WUCOLS

North-Central Coastal = Unknown
Central Valley = Unknown
South Coastal = Unknown
South Inland = Unknown
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Deciduous

Habit

Climbing

Native to

Garden origin

Drought tolerant

No

Flood tolerant

No

Toxicity

Not toxic

Plant care

Pruning

Group 3 - Cut back last year's stems to a pair of strong buds 20 cm above soil level before new growth begins in early spring.

Propagation methods

Layering, Semi-hardwood cuttings

Pests

Earwigs

Aphids

Caterpillars

Diseases

Slime flux

Prune group 3 - late flowering clematis

Tie climbers in to a frame support

Take semi-hardwood cuttings in late-summer

Mulch with leaf mould or garden compost in spring (optional)

Layer in autumn

Shade roots by placing rocks near base

Plant in full sun or partial shade (autumn or spring)

Other plants

Plants in this Genus (1344)

Clematis

Select all Deselect all
0 selected Add to a plant list
0 selected
Clematis (any Late, Large-flowered, Group 3 variety)
View
Select
Clematis (any Late, Large-flowered, Group 3 variety) Clematis (any Late, Large-flowered, Group 3 variety)
Clematis (any Early-flowering, Group 1 variety)
View
Select
Clematis (any Early-flowering, Group 1 variety) Clematis (any Early-flowering, Group 1 variety)
Clematis (any Early, Large-flowered, Group 2 variety)
View
Select
Clematis (any Early, Large-flowered, Group 2 variety) Clematis (any Early, Large-flowered, Group 2 variety)
Clematis 'Fragrant Oberon'
View
Select
Clematis 'Fragrant Oberon' Clematis 'Fragrant Oberon'
Clematis 'Brunette'
View
Select
Clematis 'Brunette' Clematis 'Brunette'
Clematis 'Justa'
View
Select
Clematis 'Justa' Clematis 'Justa'
Clematis 'Barbara Harrington'
View
Select
Clematis 'Barbara Harrington' Clematis 'Barbara Harrington'
Clematis 'Honora'
View
Select
Clematis 'Honora' Clematis 'Honora'
Clematis ispahanica
View
Select
Clematis ispahanica Clematis ispahanica
Clematis 'Royal Velours'
View
Select
Clematis 'Royal Velours' Clematis 'Royal Velours'
Clematis 'John Howells'
View
Select
Clematis 'John Howells' Clematis 'John Howells'
Clematis 'Lawsoniana'
View
Select
Clematis 'Lawsoniana' Clematis 'Lawsoniana'
Clematis 'Rooguchi'
View
Select
Clematis 'Rooguchi' Clematis 'Rooguchi'
Clematis 'Hendryetta'
View
Select
Clematis 'Hendryetta' Clematis 'Hendryetta'
Clematis armandii 'Little White Charm'
View
Select
Clematis armandii 'Little White Charm' Armand clematis 'Little White Charm'
Clematis montana var. wilsonii
View
Select
Clematis montana var. wilsonii Wilson's Himalayan clematis
Clematis 'Juuli'
View
Select
Clematis 'Juuli' Clematis 'Juuli'
Clematis 'M. Koster'
View
Select
Clematis 'M. Koster' Clematis 'M. Koster'
Clematis 'Lambton Park'
View
Select
Clematis 'Lambton Park' Clematis 'Lambton Park'
Clematis 'Aureolin'
View
Select
Clematis 'Aureolin' Clematis 'Aureolin'
Clematis 'Abigail'
View
Select
Clematis 'Abigail' Clematis 'Abigail'
Clematis 'Ada Moon'
View
Select
Clematis 'Ada Moon' Clematis 'Ada Moon'
Clematis 'Aino'
View
Select
Clematis 'Aino' Clematis 'Aino'
Clematis 'Akane no tsubo'
View
Select
Clematis 'Akane no tsubo' Clematis 'Akane no tsubo'
Clematis 'Aki'
View
Select
Clematis 'Aki' Clematis 'Aki'
Select all Deselect all Add to a plant list

Companion plants (0)

Related content

Discuss Clematis 'M. Koster' with other Shoot members
Read more
TOP