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Hardy perennial
Lamiaceae
Perennials
Agastache 'Blue Boa'
Giant Hyssop
Agastache 'Blue Boa': 90 cm high and 60 cm spread, full sun. Purple flowers in July-September. Zone 5; choose soil compatible with its moisture needs.
- Exposure
- Sun
- Life cycle
- Hardy perennial
- Hardiness
- Zone 5
Discover the plant
Common nameAgastache 'Blue Boa'
FamilyLamiaceae
GenusGiant Hyssop
CultivarBlue Boa
TypeHardy perennial
Botanical nameGiant Hyssop
Agastache 'Blue Boa' (Agastache 'Blue Boa') brings a palette of purple to the garden. Its foliage features shades of green, which can be highlighted among different textures. The usual flowering period is July-September. The clump grows to approximately 90 cm in height and 60 cm in spread; use these dimensions to position the plant in the middle of a flower bed and for group plantings.
The success of Agastache 'Blue Boa' begins with its location: full sun, in suitable soil (well-drained, rather light; avoid water pockets around the collar). After planting Agastache 'Blue Boa', water enough to deeply moisten the root ball. Once established, allow the surface to dry between waterings and prioritize drainage, especially during warm spells. A space corresponding to its 60 cm spread will prevent the need to move the clump in the first few seasons. The indicated hardiness zone is 5, to be evaluated according to your garden's conditions.
In an Agastache 'Blue Boa' planting, wait to see spring regrowth before removing parts that have dried during winter. Winter drainage is crucial for this agastache; avoid depressions where water accumulates during warm spells. For companion plants, consider border sages, catmints, and upright sedums of varieties with similar needs. Keep its 90 cm height in mind to place shorter plants on the correct side and allow the flowers to be visible during July-September.
Planting guide
From planting to establishment.
Spacing / density
23.62 inches
Best planting time
Preferably in spring, in warm, workable soil, with regular watering during establishment.
Propagation
Division of clumps; stem cuttings. Seed does not guarantee fidelity to a named cultivar.
Growing method
Agastache ‘Blue Boa’: Ideally in spring, in warm and workable soil, with consistent watering during establishment. After planting Agastache ‘Blue Boa’, water enough to thoroughly moisten the root ball. Once established, allow the surface to dry between waterings and prioritize drainage, especially during thaws. Winter drainage is crucial for this agastache; avoid depressions where water accumulates during thaws.
Soil and care
The right care,at the right time.
Soil pH
Acid to neutral; general indication of botanical group
Care level
Current Maintenance
Watering
After planting Agastache ‘Blue Boa’, water enough to thoroughly moisten the root ball. Once established, allow the surface to dry between waterings and prioritize drainage, especially during mild spells.
Soil type
Draining, rather light; avoid water pockets around the crown
Fertilization
Fertilizer for flowering
Moisture
Low to medium after establishment; priority drainage
Seasonal care
Agastache 'Blue Boa': wait until spring regrowth before removing any parts that dried out over winter. During its flowering period (July-September), also keep an eye on damaged stems and neighboring plants that might overshadow the clump.
Container growing
A garden,within reach.
Recommended pot size
Stable and perforated container, significantly wider than the root ball; dimensions to be adapted to the sold format and adult development.
To try Agastache ‘Blue Boa’ in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (60 cm). Water must drain freely after each watering; check the root ball more often than you would for plants in the ground. Plan to protect the container in winter depending on your climate.
Bloom and dimensions
Its place,in your garden.
Mature height
35 inches (89 cm)
Width / spread
23 inches (58.5 cm)
Flower color
Purple
Foliage color
Green
Foliage type
Void
Growth rate
Moderate
Growth habit
Bushy
Fragrance
Not documented for this selection
Bloom period
July-September
Garden associations
In goodcompany.
Companion plants
Associations to consider for Agastache 'Blue Boa': border sages, catmints, upright sedums. Choose varieties that tolerate sun and comparable moisture; allow each clump its adult space.
Plants to avoid
Around Agastache ‘Blue Boa’, avoid especially neighbors that would cover its leaves or strongly compete with its root ball. Compatibility of light, water, and size takes precedence over a list of so-called enemy plants.
Frequently asked questions
Your questions,answered.
Where to plant Agastache 'Blue Boa'?
Provide sun and suitable soil (well-drained, rather light; avoid water pockets around the collar). Winter drainage is crucial for this agastache; avoid depressions where water accumulates during thaws.
Where should I plant Agastache 'Blue Boa'?
Allow about 90 cm in height and 60 cm in width at maturity. About 60 cm between centers, to be adjusted according to the actual development of the clump. This size is suitable for use in the middle of a flowerbed and for group plantings.
When does Agastache 'Blue Boa' bloom?
The period indicated is July-September. The color palette of the flowers is purple. The exact date and duration depend on the climate, season, and plant establishment.
How to water and care for Agastache 'Blue Boa'?
After planting Agastache ‘Blue Boa’, water enough to thoroughly moisten the root ball. Once established, allow the surface to dry between waterings and prioritize good drainage, especially during thaws. Wait to see spring growth before removing parts that have dried during winter.
Can Agastache 'Blue Boa' be grown in a pot?
To try Agastache ‘Blue Boa’ in a container, choose a stable pot with drainage holes, suitable for the root ball and its future size (60 cm). Water must drain freely after each watering; check the root ball more often than if it were in the ground. Plan to protect the container in winter depending on your climate.
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Life,around your plants.
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