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Geranium nodosum (Knotted cranesbill)

Beginner
skill rating
1 hour care
per year
0.4m
Max height
0.5m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Geranium nodosum

Other names

Knotted cranesbill, Hardy geranium

Genus

Geranium Geranium

Species

G. nodosum - G. nodosum is a clump-forming, rhizomatous perennial with lobed, toothed, glossy, bright green leaves and, from late spring to early autumn, red-flushed stems bearing loose clusters of open, funnel-shaped, veined, purple-pink flowers with pale pink centres and notched petals.


Geranium nodosum is: Deciduous

Habit

Clump-forming

Flower

Purplish-pink, Veined in Spring; Veined, Purplish-pink in Summer; Veined, Purplish-pink in Autumn

Foliage

Bright-green in Spring; Bright-green in Summer; Bright-green in Autumn

How to care

Watch out for

Specific pests

Capsid bug , Sawflies , Vine weevil Capsid bug , Sawflies , Vine weevil

Downy mildew , Powdery mildew Downy mildew , Powdery mildew

General care

Pruning

Remove old flowers and leaves to encourage the production of new growth.

Propagation methods

Basal cuttings, Seed


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Where to grow

Geranium nodosum (Knotted cranesbill) will reach a height of 0.4m and a spread of 0.5m after 2-5 years.

Suggested uses

Beds and borders, Cottage/Informal, Ground Cover, Low Maintenance, Rock, Wildflower, Wildlife, Woodland

Cultivation

Grow in well-drained or moist but well-drained soil in full sun to full shade. Excellent as a ground cover in dry, shady areas.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Shade, Full Sun

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

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

Hardy (H4)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Geranium nodosum

Other names

Knotted cranesbill, Hardy geranium

Genus

Geranium Geranium

Species

G. nodosum - G. nodosum is a clump-forming, rhizomatous perennial with lobed, toothed, glossy, bright green leaves and, from late spring to early autumn, red-flushed stems bearing loose clusters of open, funnel-shaped, veined, purple-pink flowers with pale pink centres and notched petals.

Foliage

Deciduous

Habit

Clump-forming


Colour

Flower

Purplish-pink, Veined in Spring; Veined, Purplish-pink in Summer; Veined, Purplish-pink in Autumn

Foliage

Bright-green in Spring; Bright-green in Summer; Bright-green in Autumn


How to care

Watch out for

Specific pests

Capsid bug , Sawflies , Vine weevil

Specific diseases

Downy mildew , Powdery mildew

General care

Pruning

Remove old flowers and leaves to encourage the production of new growth.

Propagation methods

Basal cuttings, Seed


Monthly care advice


Where to grow

Geranium nodosum (Knotted cranesbill) will reach a height of 0.4m and a spread of 0.5m after 2-5 years.

Suggested uses

Beds and borders, Cottage/Informal, Ground Cover, Low Maintenance, Rock, Wildflower, Wildlife, Woodland

Cultivation

Grow in well-drained or moist but well-drained soil in full sun to full shade. Excellent as a ground cover in dry, shady areas.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Shade, Full Sun

Aspect

North, 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

Defra's Risk register #1

Plant name

Geranium nodosum (Knotted cranesbill)

Common pest name

Green semi-looper

Scientific pest name

Chrysodeixis eriosoma

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 which is morphologically identical to a pest already established in the UK in protected environments and being controlled by IPM. Not expected to cause greater impacts than other species of Chrysodeixis in the UK.

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

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This plant likes... Garden match
Soil types: Chalky, Loamy, Sandy Tell us...
Soil drainage: Moist but well-drained, Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Shade, Full Sun Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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hardy geranium

Have just obtained dormant roots of this.Can i start them off in pot in greenjouse (unheated) If not what should i do with roots? read more

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