Agastache 'Blackadder' - Giant Hyssop variety

Image of Agastache 'Blackadder' - Giant Hyssop variety
Image of Agastache 'Blackadder' - Giant Hyssop variety
Alternate Image of Agastache 'Blackadder' - Giant Hyssop variety
Alternate Image of Agastache 'Blackadder' - Giant Hyssop variety
  • Flowers attract bees

  • Flowers attract butterflies

  • Plant for chalk soil

  • Plant for sun

Strong bottlebrush-like spikes of bright violet-blue flowers emerge from dark buds above aromatic foliage. Blooms are produced for a long period from summer into autumn. Flowers are loved by bees and butterflies. 

Prefers a well-drained soil in full sun. Will tolerate drought when established.

Height: 24 - 36 inches / 60 - 90cm                      

Spread: 18 - 24 inches / 45 - 60cm

Contact Us For Availability

This plant is currently out of stock. Please contact us for details of when we expect to have more available.

Delivery Options

Our web shop is now open for you to browse and make your selection from. Postage and packing charges depend on the size and quantity of plants you buy. We only send plants out Monday (not Bank Holidays) to Thursday. This is to avoid packages being left in the postage system over the weekend.

  • Click And Collect

    Collection is available from the nursery by appointment only or from one of the events we’ll be attending. During May, June and July our show schedule is very busy so appointments are not always possible and also at other times if we are away attending an event.