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

Aster tataricus ‘Jindai’ (Tatarian aster ‘Jindai’)

Aster x frikartii ‘Monch’ (aster ‘Monch’)

Baptisia ‘Purple Smoke’ (false indigo ‘Purple Smoke’)

Brunnera macrophylla (Siberian bugloss)

Calamintha nepeta subsp. nepeta (calamint)

Camassia cusickii (quamash)

Camassia leichtlinii ‘Blue Danube’ (quamash ‘Blue Danube’)

Camassia scilloides (wild hyacinth)

Caryopteris x clandonensis ‘Dark Knight’ (bluebeard ‘Dark Knight’)