Allium sphaerocephalon (drumstick allium)

Allium x ‘Big Beauty’ (allium ‘Big Beauty’)

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)

Anemone blanda ‘Blue Shades’ (Grecian windflower ‘Blue Shades’)

Anemone nemorosa (wood anemone)

Arisaema triphyllum (Jack-in-the-pulpit)