Overview
Agastache 'Blue Boa' is a clump forming perennial in the genus Agastache, part of the Lamiaceae family, with deciduous foliage. Agastache 'Blue Boa' grows best in full sun, and tolerates well-drained soils and any pH. Its UK hardiness is rated H5. Suggested uses include borders, containers and pollinator gardens.
About
Agastache 'Blue Boa' (Blue Boa Hyssop) is a perennial cultivar of the aromatic Agastache genus, known for its mint-scented leaves. It thrives in full sun with well-drained soil and benefits from a sheltered position. This drought-tolerant plant is hardy in the UK (H5) and is suitable for borders, containers, and pollinator gardens. After flowering, cutting it back encourages bushiness and a potential second bloom, making it a rewarding addition to a garden.
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
- well-drained
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- moderate
- Aspect
- East-facing, South-facing, West-facing
- Exposure
- sheltered
- UK hardiness
- H5
Plant details
Agastache 'Blue Boa' size, habit and characteristics
- Plant type
- perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Suggested uses
- borders, containers, pollinator gardens
- Fragrance
- aromatic leaves with a minty scent
Care notes
Pruning and caring for Agastache 'Blue Boa'
- Cultivation
- Prefers well-drained soil and full sun; drought tolerant once established.
- Pruning
- Cut back after flowering to encourage bushiness and a second bloom.
- Propagation
- softwood cuttings
- Pest resistance
- Generally pest-free
- Disease resistance
- Powdery mildew
Frequently asked questions
How do I grow Agastache 'Blue Boa'?
Prefers well-drained soil and full sun; drought tolerant once established.
Where is the best place to plant Agastache 'Blue Boa'?
Agastache 'Blue Boa' prefers full sun. It suits sheltered positions.
What soil does Agastache 'Blue Boa' need?
Agastache 'Blue Boa' grows best in well-drained soil. It is happy in soil of any pH. Aim for soil that stays moderate.
How do I prune Agastache 'Blue Boa'?
Cut back after flowering to encourage bushiness and a second bloom.
Is Agastache 'Blue Boa' hardy in the UK?
Agastache 'Blue Boa' has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Agastache 'Blue Boa'?
Softwood cuttings.
From the Fenn Plants journal
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More in the Agastache genus
- Agastache 'Black Adder'
- Agastache 'Firebird'
- Agastache 'Tangerine Dreams'Hummingbird Mint
- Agastache breviflora