Giant hyssops 'Blue Boa' (Agastache 'Blue Boa')

Giant hyssops 'Blue Boa'

A multi-award-winning cultivar of giant hyssop, giant hyssops 'Blue Boa' is recognizable by the vibrant purple flowers borne on tall flower spikes. It stands out for its prolific blooms and long blooming season. An excellent choice for cottage-style gardens, the giant hyssops 'Blue Boa' is loved by gardeners primarily because of its magnificent colors, but also for its pest and disease resistance.

Scientific classification

Mints plantains olives and allies

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Perennial

Lifespan

Herb

Plant Type

Summer, Early fall

Bloom Time

60 cm

Plant Height

45 cm

Spread

Green

Leaf Color

5 - 35 ℃

Ideal Temperature

Summer, Fall

Growth Season

Moderate

Growth Rate

Quickly Identify Giant hyssops 'Blue Boa'

Sturdy stature reaching 2.5 feet (76 cm) with deep purple-blue fragrant flowers.

Terminal spikes of vibrant lavender-blue tubular flowers arranged in whorls.

Medium green fragrant leaves with serrated margins, oval shape, and pinnate vein pattern.

Distinctively square stems with green color, rough texture, and moderately branched pattern.

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Care Guide for Giant hyssops 'Blue Boa'

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Giant hyssops 'Blue Boa' thrives in moderate moisture, preferring consistent hydration while tolerating brief droughts. Weekly watering supports its health, especially during active growth. As an herbaceous perennial, it needs more frequent irrigation to nurture its foliage and flowering.

Fertilize: To promote robust growth in giant hyssops 'Blue Boa', use a balanced slow-release fertilizer in early spring and feed every 4-6 weeks during the growing season, reducing frequency by late summer. Avoid over-fertilization, especially in winter, and ensure even distribution around the base while watering thoroughly.

Pruning: Giant hyssops 'Blue Boa' features striking blue-purple flowers and aromatic foliage. Prune in early to late spring, cutting back after flowering for denser growth. Remove dead stems for health. Regular pruning enhances shape and vigor. Use clean, sharp shears to prevent disease.

Propagation: Giant hyssops 'Blue Boa' is a robust perennial with vibrant flower spikes that attract pollinators. Propagation occurs by sowing seeds with light soil contact, requiring sunlight. Use well-draining soil and keep it moist until germination. Once seedlings are hardy, transplant with adequate spacing for optimal growth.

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Common Pests & Diseases

Leaf rot Flower wilting Dark blotch Leaf wilting Flower withering

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