Blue Boa Hyssop

Agastache ‘Blue Boa’ is an upright, vigorous hummingbird mint with long spikes of deep violet-blue flowers and aromatic green foliage. Its summer flowering and strong stems suit sunny perennial borders and cut-flower plantings, while its compact branching habit brings color to pollinator gardens. ## Cultivar and size ‘Blue Boa’ is a named Terra Nova cultivar described in U.S. Plant Patent PP24050, granted November 26, 2013. The [patent record](https://patents.google.com/patent/USPP24050P3/en) describes an upright hybrid with deep purple-blue blooms and a long flowering period. It measures a five-month-old field-grown plant at about 66 cm tall and 45 cm wide; [Saunders Brothers](https://www.saundersbrothers.com/plant/Agastache-Blue-Boa) lists 24–36 inches tall and 12–24 inches wide for garden plants, illustrating how size depends on age and conditions. ## Siting Grow in full sun and well-drained soil. Saunders Brothers lists zones 5–9, dry to average soil, and summer flowering; the patent’s original Canby, Oregon, trial reports bloom from June until frost and USDA zones 6–10. That trial supports flowering into fall in that region; local timing varies. Use regional winter experience when choosing a site because reported hardiness ranges differ. ## Maintenance Water during establishment, then avoid persistently wet soil. Remove spent flower spikes if a tidier appearance is desired, and leave room for the plant's mature spread.