Agastache

Agastache Blue Boa, Agastache Blue Fortune
Agastache ‘Blue Boa’                                               Agastache ‘Blue Fortune’

Agastache

Hyssop

  • Position: full sun
  • Soil: well-drained soil
  • Flowering period: June to October
  • Height: 80-120cm
  • Foliage: deciduous
  • Hardiness: needs winter protection

Agastache is a lovely plant with upright spikes of tubular flowers and aromatic leaves. Also attractive to bees and butterflies. This herbaceous perennial prefers well-drained soil in a sunny position.

Varieties

There are many good varieties. Agastache ‘Blue Fortune’ is a popular Agastache with a bushy habit and slender, lavender-blue spikes from July to October. For lilac-blue flower heads, you could also try Agastache ‘Blue Boa”. This plant grows about to 1,20m tall. Smaller in size is Agastache ‘Blackadder’, bearing deep dark flowers and dark green leaves.

Pruning

Pruning Agastache (Hyssop). Leave the stems intact over the winter. It will provide a bit of winter protection. Cut the old, brown stems down to the ground in March, as new, fresh growth appears.

Overwinter

Agastache (hyssop) is not fully hardy. Doesn’t like wet feet in the winter months. May suffer dieback in a cold or wet winter. Cover the base of the plant with a thick layer of dry winter mulch as a precaution against dieback.

Plant combination

Agastache  goes well with ornamental grasses, lavender, achillea and hibiscus ( tree hollyhock )

Pennisetum a. 'Hameln'
Pennisetum a. ‘Hameln’