OK
In progress indicator

Geranium maderense (Giant herb robert)

Beginner
skill rating
1 hour care
per year
1.5m
Max height
1.2m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Geranium maderense

Other names

Giant herb robert, Madeira Island geranium, Madeira cranesbill, Madeira daisy, Madeiran cranesbill

Genus

Geranium Geranium

Species

G. maderense - G. maderense is a vigorous yet short-lived, evergreen perennial or biennial with rosettes of reddish-brown stems bearing lobed, deeply toothed, bright green leaves and short, erect stems bearing large, domed panicles of flat, pink flowers from late winter to late summer.


Geranium maderense is: Evergreen

Habit

Branching, Domed, Erect flower stem

Awards

RHS AGM (Award of Garden Merit)

Flower

Pale-pink, Pink in Spring; Pink, Pale-pink in Summer; Pink, Pale-pink in Winter

Foliage

Green in Spring; Green in Summer; Green in Autumn; Green in Winter

How to care

Watch out for

Specific pests

Sawflies , Slugs , Snails , Vine weevil Sawflies , Slugs , Snails , Vine weevil

Powdery mildew Powdery mildew

General care

Pruning

Remove spent flower stems and faded leaves. Leave some seed-heads if self-seeding is desired.

Propagation methods

Basal cuttings, Division, Seed


Sign up for your FREE ACCOUNT today or login to receive detailed monthly care instructions

Where to grow

Geranium maderense (Giant herb robert) will reach a height of 1.5m and a spread of 1.2m after 2-5 years.

Suggested uses

Architectural, Beds and borders, City, Containers, Cottage/Informal

Cultivation

In frost-free areas, grow in well-drained soil in full sun or partial shade. Under glass, grow in bright filtered light and loam-based compost with added sharp sand.

Soil type

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

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial 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.

Tender in frost (H3)

Companion plants

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

Botanical name

Geranium maderense

Other names

Giant herb robert, Madeira Island geranium, Madeira cranesbill, Madeira daisy, Madeiran cranesbill

Genus

Geranium Geranium

Species

G. maderense - G. maderense is a vigorous yet short-lived, evergreen perennial or biennial with rosettes of reddish-brown stems bearing lobed, deeply toothed, bright green leaves and short, erect stems bearing large, domed panicles of flat, pink flowers from late winter to late summer.

Native to

Madeira

Foliage

Evergreen

Habit

Branching, Domed, Erect flower stem

Awards

RHS AGM (Award of Garden Merit)


Colour

Flower

Pale-pink, Pink in Spring; Pink, Pale-pink in Summer; Pink, Pale-pink in Winter

Foliage

Green in Spring; Green in Summer; Green in Autumn; Green in Winter


How to care

Watch out for

Specific pests

Sawflies , Slugs , Snails , Vine weevil

Specific diseases

Powdery mildew

General care

Pruning

Remove spent flower stems and faded leaves. Leave some seed-heads if self-seeding is desired.

Propagation methods

Basal cuttings, Division, Seed


Monthly care advice


Where to grow

Geranium maderense (Giant herb robert) will reach a height of 1.5m and a spread of 1.2m after 2-5 years.

Suggested uses

Architectural, Beds and borders, City, Containers, Cottage/Informal

Cultivation

In frost-free areas, grow in well-drained soil in full sun or partial shade. Under glass, grow in bright filtered light and loam-based compost with added sharp sand.

Soil type

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

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial 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.

Tender in frost (H3)

USDA zones

Zone 11, Zone 10, Zone 9

Defra's Risk register #1

Plant name

Geranium maderense (Giant herb robert)

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/

In order to add a note on this plant, please add this plant to your plant lists.

In progress indicator
Full size image
In progress indicator
Caption

Caption

Cancel and close this form
In progress indicator
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: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Sun Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Tender in frost (H3) Tell us...

DISCUSS THIS PLANT

geranium maderense

what is the best time to sow seeds of geranium maderense read more

There are 6 active discussions about Geranium maderense (Giant herb robert)

View all discussions

GARDENS WITH THIS PLANT

My Garden
My Garden
Patricia Jones
My Garden
My Garden
Sheila Cartwright
My Garden
My Garden
mikeb
Maples
Maples
John Smith
My Garden
My Garden
kate mccomb
My Garden
My Garden
Fiona
Main garden
Main garden
Julien Boast

ARTICLES WITH THIS PLANT

Linklaters Garden for Maggie’s

By garden designer Darren Hawkes. The pioneering charity Maggie’s whose groundbreaking Cancer Caring Centres have revolutionised the concept of therapeutic gardens, is bringing its first Show… read more

View all 8 articles


Report content or feedback to Shoot

To add ? to your lists,
login to your account or subscribe.

Find out more about plant lists here

or Login


To check if this plant is suitable for your garden first login to your account or subscribe.

or Login

In progress indicator
Note

Note

You are adding a note to: ?

Cancel