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Agastache 'Blackadder' - 3Ltr is unavailable at this time.
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Cached data:

(giant hyssop 'Blackadder')
Family Lamiaceae
Garden origin

A clump forming herbaceous perennial with aromatic foliage. Long smoky blue black flower spikes produced over a long period in summer attract bees and butterflies.
Grow in well drained soil in full sun.

Eventual mature plant size :
Height 1m
Spread 50cm
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