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Agastache Blackadder Special Offer

Agastache Blackadder



  • Common Name: Giant hyssop
  • Position: Full sun, South-facing, West-facing, Sheltered
  • Soil: Well-drained, Chalk, Loam, Sand, Acid, Alkaline, Neutral
  • Flowers: Summer, Autumn
  • Flower Colour: Black, Blue
  • Hardiness: H4 - Hardy through most of the UK
  • Habit: Deciduous, Bushy
  • Height & Spread: 90cm × 40cm
Herbaceous perennial with aromatic green leaves and bearing long-lasting, tiny, violet-blue flowers throughout summer and into autumn.
Agastache 'Blackadder' RHS Perfect for Pollinators