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5 plants matched your search criteria.

Agastache 'Black Adder'

Hyssop

The second fantastic Agastache given to us by Coen Jansen, 'Black Adder' boasts numerous bottlebrush flowers of vivid blue from mid summer to frost on a compact, rounded plant. It has been hardy for us in the ground and in containers and has proven to be a reliable production plant as well. An early pinch keeps it more compact in pots.

Agastache 'Black Adder'

Agastache 'Blue Boa'

Hyssop

Luxurious, deep violet-blue flower spikes over ultra-green foliage. Unlike any other Agastache. The flower spikes are long, wide and extremely showy. It's a great perennial color spot for summer bloom. It is drought tolerant once established and attracts hummingbirds as well as butterflies. We have found all of that to be absolutely true in our trial gardens. This is a must-have feature in your perennial beds and meadows.

Agastache 'Blue Boa'

Agastache 'Blue Fortune'

Anise hyssop

Selected for its profusion of long lasting, deep violet-blue flower spikes that appear from July to September above fragrant foliage. Prefers average to dry locations and is a butterfly magnet! Bred and selected by Gert Fortgens of the Arboretum Trompenberg, in Rotterdam. Agastache 'Blue Fortune' is long flowering, heat and drought tolerant, as well as insect and disease resistant. 'Blue Fortune' is a hybrid of species native to the US and Korea, A. foeniculum x A. rugosa.

Agastache 'Blue Fortune'

Agastache 'Purple Haze'

Hyssop

This decidedly hardy Agastache displays long racemes of smoky blue violet flowers that never seem to stop coming. It remains compact in a container with an early pinch and is in flower from July to frost. It has survived wet and dry, warm and cold winters in Pennsylvania where it has been in the ground since Spring 2000. Hardiness beyond zone 6 is unknown.

Agastache 'Purple Haze'

Agastache foeniculum

Anise hyssop

An upright, clump-forming perennial native to parts of the upper Midwest and Great Plains region. Lavender to purple flowers are densely packed along showy, cylindrical, terminal spikes mid to late summer. Medium green, lanceolate foliage remains clean throughout the season and carries a refreshing anise scent, attracting hummingbirds and butterflies.

Agastache foeniculum