Geum 'Karlskaer' (Avens 'Karlskaer')

Botanical name

Geum 'Karlskaer'

Other names

Avens 'Karlskaer'

Genus

Geum Geum

Variety or Cultivar

'Karlskaer' _ 'Karlskaer' is a mound-forming, deciduous to semi-evergreen perennial with pinnate, hairy, scalloped and toothed, mid- to dark green basal leaves and slender, wiry, reddish-brown stems bearing single to semi-double, saucer-shaped, orange to yellow-orange flowers from late spring into summer.

Native to

Garden origin

Foliage

Semi evergreen

Habit

Cushion or Mound Forming

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Colour

Flower

Yellow-orange, Orange in Spring; Yellow-orange, Orange in Summer

Foliage

Mid-green in All seasons

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How to care

Watch out for

Specific pests

Aphids , Glasshouse red spider mite , Sawflies

General care

Pruning

Cut back old stems after flowering.

Propagation methods

Division

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Monthly care advice

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Where to grow

Geum 'Karlskaer' (Avens 'Karlskaer') will reach a height of 0.3m and a spread of 0.5m after 2-5 years.

Suggested uses

Rock, Low Maintenance, Gravel, Cottage/Informal, Beds and borders

Cultivation

Best in fertile, moist but well-drained or well-drained soil in sun. Flowers are sterile so bloom time is extended. Tolerates partial shade. Avoid waterlogged soil in winter. Dies back in cold climates, may be evergreen or semi-evergreen in warm areas.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained, Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 7, Zone 6, Zone 5

Defra's Risk register #1

Plant name

Geum 'Karlskaer' (Avens 'Karlskaer')

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Geum 'Karlskaer' (Avens 'Karlskaer')

Common pest name

Lance nematode; Nematode; Lance

Scientific pest name

Hoplolaimus spp.

Type

Nematode

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Nematode species potentially affecting a wide variety of crops; prohibition of soil likely to mitigate risk substantially; keep under review in light of interceptions or findings should they occur in the EU.

Defra's Risk register #3

Plant name

Geum 'Karlskaer' (Avens 'Karlskaer')

Common pest name

Scientific pest name

Orgyia thyellina

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Polyphagous moth pest from Eastern Asia which could be damaging to broadleaf and coniferous species if introduced to the UK; as well as having human health impacts. The main pathway is likely to be on goods (including non-plant material) imported from Eastern Asia and awareness raising with the main industry sectors is recommended.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/