Agastache 'Blue Boa' ® (giant hyssop 'Blue Boa') is a member of the Lamiaceae family. This perennial exhibits a bushy growth habit and is characterized by its deciduous foliage. It has a hardiness rating of hardy – average winter (-10 to -5ºc), and is hardy through most of the uk apart from inland valleys, at altitude and central / northerly locations. may suffer foliage damage and stem dieback in harsh winters in cold gardens. plants in pots are more vulnerable. .
When fully mature, Agastache 'Blue Boa' ® can reach an ultimate height of 0.5–1 metres and a spread of 0.1–0.5 metres. For optimal growth, it prefers south–facing, west–facing aspect and exposed, sheltered exposure. It thrives best in chalk, loam, sand soil types and should be placed in a full sun position.
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