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Pelargonium sidoides (Kalwerbossie geranium)

Intermediate
skill rating
2 hours care
per year
0.3m
Max height
0.3m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Pelargonium sidoides

Other names

Kalwerbossie geranium, Rabassam, Silverleaf geranium

Genus

Pelargonium Pelargonium

Species

P. sidoides - P. sidoides is a tender, compact, rosette-forming, evergreen to semi-evergreen perennial with long-stalked, mildly aromatic, heart-shaped, velvety, grey-green leaves and loose clusters of dark maroon flowers from late spring and throughout summer.


Pelargonium sidoides is: Evergreen

Fragrance

Leaves are mildly aromatic.

Habit

Compact, Rosette

Flower

Maroon in Spring; Maroon in Summer

Foliage

Grey-green in All seasons

How to care

Watch out for

Specific pests

Caterpillars , Glasshouse leafhopper , Glasshouse whitefly , Root mealybugs , Thrips , Vine weevil Caterpillars , Glasshouse leafhopper , Glasshouse whitefly , Root mealybugs , Thrips , Vine weevil

Grey mould Grey mould

General care

Pruning

Deadhead regularly. Remove old flower stalks and faded or dead foliage in late autumn or early winter.

Propagation methods

Basal cuttings, Seed


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Where to grow

Pelargonium sidoides (Kalwerbossie geranium) will reach a height of 0.3m and a spread of 0.3m after 2-5 years.

Suggested uses

Beds and borders, City, Coastal, Conservatory, Containers, Drought Tolerant, Greenhouse

Cultivation

Outdoors, grow in frost-free areas in fertile, well-drained soil. Under glass, grow in a loam-less or loam-based compost in full light with shade from hot sun. Water moderately when in growth and sparingly in winter. May die back in drought and in winter.

Soil type

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

Soil drainage

Well-drained

Soil pH

Alkaline, Neutral

Light

Full Sun

Aspect

North, South, East, West

Exposure

Sheltered

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

Hardy (H4), Tender in frost (H3)

Companion plants

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

Botanical name

Pelargonium sidoides

Other names

Kalwerbossie geranium, Rabassam, Silverleaf geranium

Genus

Pelargonium Pelargonium

Species

P. sidoides - P. sidoides is a tender, compact, rosette-forming, evergreen to semi-evergreen perennial with long-stalked, mildly aromatic, heart-shaped, velvety, grey-green leaves and loose clusters of dark maroon flowers from late spring and throughout summer.

Foliage

Evergreen

Fragrance

Leaves are mildly aromatic.

Habit

Compact, Rosette


Colour

Flower

Maroon in Spring; Maroon in Summer

Foliage

Grey-green in All seasons


How to care

Watch out for

Specific pests

Caterpillars , Glasshouse leafhopper , Glasshouse whitefly , Root mealybugs , Thrips , Vine weevil

Specific diseases

Grey mould

General care

Pruning

Deadhead regularly. Remove old flower stalks and faded or dead foliage in late autumn or early winter.

Propagation methods

Basal cuttings, Seed


Monthly care advice


Where to grow

Pelargonium sidoides (Kalwerbossie geranium) will reach a height of 0.3m and a spread of 0.3m after 2-5 years.

Suggested uses

Beds and borders, City, Coastal, Conservatory, Containers, Drought Tolerant, Greenhouse

Cultivation

Outdoors, grow in frost-free areas in fertile, well-drained soil. Under glass, grow in a loam-less or loam-based compost in full light with shade from hot sun. Water moderately when in growth and sparingly in winter. May die back in drought and in winter.

Soil type

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

Soil drainage

Well-drained

Soil pH

Alkaline, Neutral

Light

Full Sun

Aspect

North, South, East, West

Exposure

Sheltered

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

Hardy (H4), Tender in frost (H3)

USDA zones

Zone 11, Zone 9, Zone 8, Zone 7

Defra's Risk register #1

Plant name

Pelargonium sidoides (Kalwerbossie geranium)

Common pest name

Omnivorous leafroller

Scientific pest name

Platynota stultana

Type

Insect

Current status in UK

Absent

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

4

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

3

General biosecurity comments

Polyphagous pest which could be potentially damaging to a range of crops if introduced to the UK. Awareness raising amongst the industry is needed. Also need to monitor developments in Spain where the pest is already present and consider whether EU regulation is warranted.

Defra's Risk register #2

Plant name

Pelargonium sidoides (Kalwerbossie geranium)

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.

Defra's Risk register #3

Plant name

Pelargonium sidoides (Kalwerbossie geranium)

Common pest name

Banded-winged whitefly

Scientific pest name

Trialeurodes abutiloneus

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 whitefly native to the Americas with the potential to introduce harmful viruses to the UK. EU regulation should be considered and further assessed by EPPO.

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, Clay, Loamy, Sandy (will tolerate most soil types) Tell us...
Soil drainage: Well-drained Tell us...
Soil pH: Alkaline, Neutral Tell us...
Light: Full Sun Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Hardy (H4), Tender in frost (H3) Tell us...

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