Geum rivale (Water avens)

Botanical name

Geum rivale

Other names

Water avens, Nodding avens, Drooping avens, Cure all, Water flower, Purple avens, Chocolate root

Genus

Geum Geum

Species

G. rivale - G. rivale is an upright , clump-forming perennial with pinnate basal leaves, oval or wedge-shaped upper leaves and, from late spring to midsummer, erect, dark purple stems bearing pendent, bell-shaped, dusky pink, purple-red or dark orange-red flowers.

Native to

Asia, Europe, United States

Foliage

Deciduous

Habit

Clump-forming, Upright

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Colour

Flower

Orange-red, Purple-pink, Pale-pink in Spring; Purple-pink, Pale-pink, Orange-red in Summer

Foliage

Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn

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How to care

Watch out for

Specific pests

Aphids , Glasshouse red spider mite , Sawflies

Specific diseases

Downy mildew , Powdery mildew

General care

Pruning

Cut back old stems after flowering.

Propagation methods

Division, Seed

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Monthly care advice

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Where to grow

Geum rivale (Water avens) will reach a height of 0.4m and a spread of 0.5m after 2-5 years.

Suggested uses

Beds and borders, Bees (attract & feed bees), Cottage/Informal, Gravel, Low Maintenance, Naturalised in turf, Waterside, Woodland

Cultivation

Grow in moist or wet soil in full sun or partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Boggy damp conditions, Moist but well-drained, Moisture-retentive

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 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Geum rivale (Water avens)

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 rivale (Water avens)

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 rivale (Water avens)

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/