allium lusitanicum ‘Summer Beauty’ (allium ‘Summer Beauty’)

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)

Andropogon gerardii ‘Red October’ (big bluestem ‘Red October’)

Anemone hupehensis var. japonica ‘Splendens’ (Japanese anemone ‘Splendens’)