Agastache 'Blue Boa' (PBR)

Mexican giant hyssop

Agastache 'Blue Boa' (PBR)

Mexican giant hyssop

  • within 4 weeks
  • 6 × 9cm pots
  • £47.94 £23.97
  • within 4 weeks
  • 9cm pot
  • £7.99
Delivery options
  • Standard £4.95

This perennial dies back to below ground level each year in autumn, then fresh new growth appears again in spring.

  • Position: full sun
  • Soil: well-drained, fertile soil
  • Rate of growth: average
  • Flowering period: July to October
  • Hardiness: hardy (borderline)

    This new hyssop is dependably hardy to -5C, and it produces its fattened spikes of deep violet-blue flowers over a long period from midsummer. These not only look great, but they will also help attract lots of beneficial insects, so it's perfect for a wildlife-friendly garden, while the rich green foliage, which releases its licorice-like aroma when gently bruised, makes it valuable for sensory gardens.

  • Garden care: Don't cut back the faded flower-stems in until early spring, as they provide interest in the winter months. Lift and divide congested colonies in spring.