Agastache ‘Blue Fortune’ (giant hyssop ‘Blue Fortune’)

Allium atropurpureum (ornamental onion)

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

Allium ‘Millenium’ (allium ‘Millenium’)

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

Amsonia hubrichtii (threadleaf blue star)

Amsonia tabernaemontana var. salicifolia (willow leaf blue star)

Asclepias syriaca (common milkweed)

Asclepias tuberosa (orange butterfly weed)

Astilbe chinensis var. taquetii ‘Purpurlanze’ (Chinese astilbe ‘Purple Lance’)