Agastache foeniculum 'Liquorice Blue' (Giant hyssop 'Liquorice Blue')

Botanical name

Agastache foeniculum 'Liquorice Blue'

Other names

Giant hyssop 'Liquorice Blue', Anise hyssop 'Liquorice Blue', Liquorice mint 'Liquorice Blue', Licorice mint 'Liquorice Blue', Korean mint 'Liquorice Blue'

Genus

Agastache Agastache

Variety or Cultivar

'Liquorice Blue' _ 'Liquorice Blue' is an upright, deciduous perennial, sometimes grown as an annual, with aromatic, ovate to broadly lance-shaped, toothed, light green leaves and, from summer into autumn, cylindrical spikes of whirled, tubular, two-lipped, violet-blue flowers with reddish-purple calyces.

Native to

Garden origin

Foliage

Deciduous

Fragrance

Aniseed/liquorice, bubblegum-like scented foliage

Habit

Clump-forming, Upright

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Colour

Flower

Violet, Blue in Summer; Blue, Violet in Autumn

Foliage

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

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How to care

Watch out for

Specific diseases

Powdery mildew

General care

Pruning

Remove faded flower spikes to prolong flowering.

Propagation methods

Division, Seed

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Monthly care advice

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Where to grow

Agastache foeniculum 'Liquorice Blue' (Giant hyssop 'Liquorice Blue') will reach a height of 0.6m and a spread of 0.6m after 1-2 years.

Suggested uses

Bees (attract & feed bees), Beds and borders, City, Cottage/Informal, Garden edging, Gravel, Ground Cover, Wildlife

Cultivation

Plant in fertile, well-drained soil in full sun.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, West

Exposure

Exposed, Sheltered

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

Hardy (H4), Tender in frost (H3)

USDA zones

Zone 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Agastache foeniculum 'Liquorice Blue' (Giant hyssop 'Liquorice Blue')

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/