Agastache rugosa

RHS Plant Profile

Korean mint

RHS

Other common names

wrinkled giant hyssop

Synonyms

Agastache foeniculum misapplied

Herbaceous Perennial

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Clump-forming, herbaceous perennial from 80cm-1.5m in height. The edible leaves have an aniseed flavour and the spikes of purple flowers, produced all summer and into autumn, are very attractive to bees

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 1-1.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: West–facing or South–facing or East–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H4

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Agastache are herbaceous perennials with simple, aromatic leaves and small 2-lipped tubular flowers in whorls forming dense spikes, in summer and autumn; some are rather tender but can be grown as annual bedding
Name Status: Correct
Plant Range: China, Japan

How to Grow

Cultivation

Grow in reasonably well-drained soil in full sun with shelter

Propagation

Propagate by seed or by division in spring

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens
City and courtyard gardens
Flower borders and beds

Pruning

Remove spent flowering spikes through the season

Pests

Generally pest-free

Diseases

May be susceptible to Powdery mildews in dry summers