Agastache 'Blue Boa' (PBR)
Mexican giant hyssop
- 6 × 9cm pots
- available to order from spring
- 9cm pot
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 until early spring, as they provide interest in the winter months. Lift and divide congested colonies in spring.