Helleborus viridis ssp. occidentalis
Helleborus x sternii 'Grey Star'
Distylium myricoides 'Blue Cascade'
Paeonia suffruticosa 'Jin Ge'
Cardiocrinum giganteum
Schizachyrium scoparium 'Blue Heaven'
Clematis 'Blue Angel'
Hydrangea macrophylla 'Princess Diana'
Coronilla orientalis