Pycnanthemum muticum (Cluster mountain mint)

Botanical name

Pycnanthemum muticum

Other names

Cluster mountain mint, Clustered mountain mint, Blunt mountainmint, Mountain mint, Short-toothed mountain mint

Genus

Pycnanthemum Pycnanthemum

Species

P. muticum - P. muticum is a clump-forming, aromatic, rhizomatous, deciduous perennial with upright, branching stems bearing ovate to lance-shaped, pointed, grey-green leaves and dense clusters of small, tubular, two-lipped, pink or white flowers in summer.

Foliage

Deciduous

Habit

Branching, Clump-forming, Upright

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Colour

Flower

Pink in Summer

Foliage

Grey-green in Spring; Grey-green in Summer; Grey-green in Autumn

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How to care

Watch out for

Pests

Generally pest free

Diseases

Generally disease free

General care

Pruning

Cut back after flowering or leave seed heads for winter interest. Prune roots in spring with a spade to prevent unwanted spread.

Propagation

Divide congested plants in spring or autumn.

Propagation methods

Division, Seed

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Monthly care advice

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Where to grow

Pycnanthemum muticum (Cluster mountain mint) will reach a height of 0.9m and a spread of 0.9m after 2-5 years.

Suggested uses

Beds and borders, City, Cottage/Informal, Low Maintenance, Prairie planting, Wildlife

Cultivation

Grow in fertile, moist or moist but well-drained soil in full sun or partial shade. Flowering is best in full sun. Will spread by rhizomes.

Soil type

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

Soil drainage

Moist but well-drained, Moisture-retentive

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, 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 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Pycnanthemum muticum (Cluster mountain mint)

Common pest name

tomato thrips

Scientific pest name

Ceratothripoides brunneus

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

Thrips present in Africa; the Caribbean and parts of Asia; frequently intercepted in the UK. Can cause significant damage to tomatoes and other crops in countries where it is present. Europe wide PRA will consider its potential to establish and cause damage.

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