Helenium 'Waltraut'Helenium 'Waltraut'
Perovskia atriplicifolia 'Blue Spire'Perovskia atriplic ...
Phlomis russelianaRussel-Brandkraut ...
Phlox paniculata 'Blue Paradise'Phlox paniculata ' ...
Stachys monieri 'Hummelo'Stachys monieri 'H ...
Veronicastrum virginicum 'Fascination'Veronicastrum virg ...