OK
In progress indicator

Althaea officinalis (Marsh mallow)

Beginner
skill rating
1 hour care
per year
2.5m
Max height
0.5m
Max spread
1-2 years
To maturity

Plant details

Botanical name

Althaea officinalis

Other names

Marsh mallow, Romney marsh, Bismalva, Guimauve, Joseph's staff, Mauve, Mortification root, White mallow, Wymot, Wymote, Althaea kragujevacensis, Althaea taurinensis

Genus

Althaea Althaea

Species

A. officinalis - A. officinalis is an erect, deciduous perennial with lobed, toothed, softly hairy, grey-green leaves and clusters of pale lilac-pink flowers from midsummer into autumn.


Althaea officinalis is: Deciduous

Habit

Erect

Flower

White, Flushed pink in Summer

Foliage

Grey-green in Summer

How to care

Watch out for

Specific pests

Capsid bug , Caterpillars , Flea beetles , Slugs Capsid bug , Caterpillars , Flea beetles , Slugs

Diseases

Susceptible to a rust.

General care

Pruning

Cut back to the base after flowering.

Propagation methods

Seed


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

Where to grow

Althaea officinalis (Marsh mallow) will reach a height of 2.5m and a spread of 0.5m after 1-2 years.

Suggested uses

Beds and borders, Bog garden, Coastal, Cottage/Informal, Waterside, Wildlife

Cultivation

Plant in damp, moist soil in full sun. Staking is advised,particularly in windy locations.

Soil type

Clay, Loamy, Sandy

Soil drainage

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

Soil pH

Acid, Alkaline, Neutral

Light

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)

Companion plants

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

Botanical name

Althaea officinalis

Other names

Marsh mallow, Romney marsh, Bismalva, Guimauve, Joseph's staff, Mauve, Mortification root, White mallow, Wymot, Wymote, Althaea kragujevacensis, Althaea taurinensis

Genus

Althaea Althaea

Species

A. officinalis - A. officinalis is an erect, deciduous perennial with lobed, toothed, softly hairy, grey-green leaves and clusters of pale lilac-pink flowers from midsummer into autumn.

Foliage

Deciduous

Habit

Erect


Colour

Flower

White, Flushed pink in Summer

Foliage

Grey-green in Summer


How to care

Watch out for

Specific pests

Capsid bug , Caterpillars , Flea beetles , Slugs

Diseases

Susceptible to a rust.

General care

Pruning

Cut back to the base after flowering.

Propagation methods

Seed


Monthly care advice


Where to grow

Althaea officinalis (Marsh mallow) will reach a height of 2.5m and a spread of 0.5m after 1-2 years.

Suggested uses

Beds and borders, Bog garden, Coastal, Cottage/Informal, Waterside, Wildlife

Cultivation

Plant in damp, moist soil in full sun. Staking is advised,particularly in windy locations.

Soil type

Clay, Loamy, Sandy

Soil drainage

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

Soil pH

Acid, Alkaline, Neutral

Light

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

Althaea officinalis (Marsh mallow)

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 #2

Plant name

Althaea officinalis (Marsh mallow)

Common pest name

cotton mealybug

Scientific pest name

Phenacoccus solenopsis

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

Watching brief for potential impact on tomato production in the Mediterranean. Other southern European countries likely to be more at risk. Precautionary action will be taken on findings on planting material to protect glasshouse crops and botanical gardens.

Defra's Risk register #3

Plant name

Althaea officinalis (Marsh mallow)

Common pest name

Scientific pest name

Epicauta atomaria

Type

Insect

Current status in UK

Absent

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

1

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

3

General biosecurity comments

South American blister beetle; affecting solanaceous crops which (as plants for planting) are prohibited from entering 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: Clay, Loamy, Sandy Tell us...
Soil drainage: Boggy damp conditions, Moist but well-drained, Moisture-retentive Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Full Sun Tell us...
Aspect: South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

DISCUSS THIS PLANT

Althaea officinalis

Marsh-mallow is a tall plant resembling a hollyhock. Some people consider it to be difficult to grow in the garden, but it is widely available from nurseries. The slimy roots used to be boiled to a… read more

There are 2 active discussions about Althaea officinalis (Marsh mallow)

View all discussions

GARDENS WITH THIS PLANT

Old garden
Old garden
Sue Kunzmann

ARTICLES WITH THIS PLANT

Anton Chekhov's Garden

By garden designers Anna Benn and Hannah Gardner. A Russian-themed garden based on the country estate near Moscow where Anton Chekhov, one of Russia’s greatest writers, wrote his famous play … read more


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