Agastache 'Blue Boa' - Hummingbird Mint - Giant Hyssop

Agastache 'Blue Boa' is a compact, showy hummingbird mint with dense spikes of deep violet-blue flowers from summer into autumn. The aromatic, minty foliage releases its scent as you brush past, and the flowers are a magnet for bees and butterflies.

Key features

• Rich violet-blue flower spikes, summer to autumn
• Fragrant anise-mint foliage
• Loved by bees, butterflies and other pollinators
• Drought tolerant once established
• Approx. 50–60 cm tall x 40–45 cm wide

Growing tips

• Full sun (north- or west-facing spots are ideal)
• Well-drained soil is essential; avoid winter wet
• Frost hardy and suited to cold-climate gardens
• Cut back spent stems in late winter or early spring