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Veronica petraea 'Madame Mercier' (Speedwell 'Madame Mercier')

Beginner
skill rating
1 hour care
per year
0.1m
Max height
0.45m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Veronica petraea 'Madame Mercier'

Other names

Speedwell 'Madame Mercier', Alpine veronica 'Madame Mercier', Veronica petraca Mme Mercier

Genus

Veronica Veronica

Variety or Cultivar

'Madame Mercier' _ 'Madame Mercier' is mat-forming, herbaceous perennial with oval to triangular, veined, toothed, semi-glossy, bronze-green leaves and clusters of small, veined, lavender flowers in mid- to late spring with sporadic blooms until autumn.


Veronica petraea 'Madame Mercier' is: Deciduous

Habit

Mat Forming

Flower

Lavender in Spring; Lavender in Summer; Lavender in Autumn

Foliage

Bronze-green in Spring; Bronze-green in Autumn

How to care

Watch out for

Pests

Generally pest-free.

Downy mildew , Leaf spot , Powdery mildew Downy mildew , Leaf spot , Powdery mildew

General care

Pruning

No pruning required but can be trimmed lightly in autumn.

Propagation methods

Division


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Where to grow

Veronica petraea 'Madame Mercier' (Speedwell 'Madame Mercier') will reach a height of 0.1m and a spread of 0.45m after 2-5 years.

Suggested uses

Rock, Ground Cover, Garden edging, Flower Arranging, Cottage/Informal, City, Beds and borders, Wildlife

Cultivation

Plant in loamy, moderately fertile, moist but well-drained soil in sun or partial shade.

Soil type

Loamy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

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

Veronica petraea 'Madame Mercier'

Other names

Speedwell 'Madame Mercier', Alpine veronica 'Madame Mercier', Veronica petraca Mme Mercier

Genus

Veronica Veronica

Variety or Cultivar

'Madame Mercier' _ 'Madame Mercier' is mat-forming, herbaceous perennial with oval to triangular, veined, toothed, semi-glossy, bronze-green leaves and clusters of small, veined, lavender flowers in mid- to late spring with sporadic blooms until autumn.

Foliage

Deciduous

Habit

Mat Forming


Colour

Flower

Lavender in Spring; Lavender in Summer; Lavender in Autumn

Foliage

Bronze-green in Spring; Bronze-green in Autumn


How to care

Watch out for

Pests

Generally pest-free.

Specific diseases

Downy mildew , Leaf spot , Powdery mildew

General care

Pruning

No pruning required but can be trimmed lightly in autumn.

Propagation methods

Division


Monthly care advice


Where to grow

Veronica petraea 'Madame Mercier' (Speedwell 'Madame Mercier') will reach a height of 0.1m and a spread of 0.45m after 2-5 years.

Suggested uses

Rock, Ground Cover, Garden edging, Flower Arranging, Cottage/Informal, City, Beds and borders, Wildlife

Cultivation

Plant in loamy, moderately fertile, moist but well-drained soil in sun or partial shade.

Soil type

Loamy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

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

Defra's Risk register #1

Plant name

Veronica petraea 'Madame Mercier' (Speedwell 'Madame Mercier')

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa subsp. multiplex

Type

Bacterium

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)

4

General biosecurity comments

A bacterial disease with a wide host range detected in Corsica. Although EU regulated; there remains some concern about the risk of introduction. This subspecies is known to be able to thrive in cooler climates. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

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: Loamy Tell us...
Soil drainage: Moist but well-drained, Well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Sun Tell us...
Aspect: South, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

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