Aconitum carmichaelii ‘Arendsii’ (azure monkshood ‘Arendsii’)

Aconitum henryi ‘Spark’s Variety’ (monkshood ‘Spark’s Variety)

Actaea ‘Queen of Sheba’ (bugbane ‘Queen of Sheeba’)

Agastache foeniculum (anise hyssop)

Ageratina altissima (white snakeroot)

Amelanchier laevis (Allegheny juneberry)

Amsonia ‘Blue Ice’ (blue star ‘Blue Ice’)

Amsonia hubrichtii (threadleaf blue star)

Amsonia tabernaemontana ‘Fontana’ (blue star ‘Fontana’)

Amsonia tabernaemontana var. salicifolia (willow leaf blue star)