Agastache Liquorice Blue by Bishy Barnabees Cottage Garden Ltd features tall spikes of purple flowers with lush green leaves, densely growing in gardens and beautifully reminiscent of a natural border radius.

Agastache Liquorice Blue

£2.20
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Agastache Liquorice Blue by Bishy Barnabees Cottage Garden Ltd features tall spikes of purple flowers with lush green leaves, densely growing in gardens and beautifully reminiscent of a natural border radius.
RHS Plants for Pollinators

Agastache Liquorice Blue

Agastache rugosa 'Liquorice Blue'

5 reviews

Tall violet-blue bottle-brush spikes above aniseed-scented foliage — one of the best garden plants for late-summer bees, flowering from July to October in year one from seed.

£2.20

Free UK delivery on seed orders over £30

Dispatched from our Norfolk farm — Royal Mail, usually within one working day.

Your growing year

Sow, plant out and flowering months for this variety

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Plant out
In flower
SowPlant outIn flower

At a glance

Height
70–90cm
Spread
45cm
Spacing
40cm
Position
Full sun; sheltered from cold winds
Colour
Purple
Seeds per packet
90
Soil
Free-draining, average to lean — avoids wet/clay in winter
Grow guide How to grow Agastache Liquorice Blue Read the full guide →

About this variety

Upright violet-blue bottlebrush spikes from July to the first frosts, above foliage that smells strongly of aniseed and liquorice the moment you brush it. It reaches 70 to 90cm in its first summer and flowers the same year from a spring sowing, which is unusual for a perennial.

If you grow one plant for bees, grow this. The spikes carry nectar so freely that an established clump is audible on a warm August afternoon, and it keeps going through late summer when a lot of the border has finished. Rabbits and deer leave the aromatic leaves alone.

Call it short-lived and you will not be disappointed. In sharp-draining sunny ground it will give you three or four years. In heavy soil, or through a wet Norfolk winter, it will rot at the crown and you will be sowing again in spring. Drainage matters far more than feeding, and a plant on poor dry ground usually outlives a pampered one. Cut it for the vase and the scent comes indoors with it. It dries well too, spikes and all.

RHS Plants for Pollinators

This plant has been assessed by the Royal Horticultural Society and recommended as especially beneficial to bees, butterflies and other pollinators. Growing plants like this directly supports UK pollinator populations — something close to our hearts at Salle Moor Hall Farm, where we see the difference a cottage garden full of the right plants can make.

Learn more at RHS.org.uk →