Overview
Agastache rugosa 'Liquorice Blue' is a clump forming herbaceous perennial in the genus Agastache, part of the Lamiaceae family, with deciduous foliage. It typically grows around 1-1.5 metres tall and 0.1-0.5 metres wide, reaching full size in around 2-5 years. Agastache rugosa 'Liquorice Blue' grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H4. Suggested uses include cottage and informal garden, gravel garden, wildlife gardens, banks and slopes and flower borders and beds.
About
Agastache rugosa, also known as wrinkled giant hyssop, Korean mint, purple giant hyssop, Indian mint, Chinese patchouli, or Huoxiang, is an aromatic herb in the mint family, native to East Asia.
Wikipedia contributors, CC BY-SA 4.0 — Agastache rugosa
About the genus
Agastache is a genus of aromatic flowering herbaceous perennial plants in the family Lamiaceae. It contains 22 species, mainly native to North America, one species native to eastern Asia. The common names of the species are a variety of fairly ambiguous and confusing "hyssops" and "mints"; as a whole the genus is known as giant hyssops or hummingbird mints.
Wikipedia contributors, "Agastache", CC BY-SA 4.0 — Agastache
Growing conditions
Best soil and position for Agastache
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H4
Plant details
Agastache rugosa 'Liquorice Blue' size, habit and characteristics
- Plant type
- Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 1-1.5 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- Cottage and informal garden, Gravel garden, Wildlife gardens, Banks and slopes, Flower borders and beds
Care notes
Pruning and caring for Agastache rugosa 'Liquorice Blue'
- Propagation
- Division in spring, Semi-ripe cuttings in late summer
- Pest resistance
- Generally pest-free
- Disease resistance
- Powdery mildews
Frequently asked questions
Where is the best place to plant Agastache rugosa 'Liquorice Blue'?
Agastache rugosa 'Liquorice Blue' prefers full sun. It suits sheltered positions.
What soil does Agastache rugosa 'Liquorice Blue' need?
Agastache rugosa 'Liquorice Blue' is adaptable and grows happily in most soil types, including chalk, loam and sand. It is happy in soil of any pH. Aim for soil that stays well-drained.
How big does Agastache rugosa 'Liquorice Blue' grow?
Agastache rugosa 'Liquorice Blue' reaches a height of 1-1.5 metres and a spread of 0.1-0.5 metres. It takes around 2-5 years to reach full size.
Is Agastache rugosa 'Liquorice Blue' hardy in the UK?
Agastache rugosa 'Liquorice Blue' has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Agastache rugosa 'Liquorice Blue'?
Division in spring, Semi-ripe cuttings in late summer.
More in the Agastache genus
- Agastache 'Black Adder'
- Agastache 'Firebird'
- Agastache 'Tangerine Dreams'Hummingbird Mint
- Agastache breviflora