Buddleja davidii 'Empire Blue'Buddleja davidii ' ...
Caryopteris x clandonensis 'Heavenly Blue'Caryopteris x clan ...
Hydrangea paniculata 'Vanille Fraise'Hydrangea panicula ...
Nepeta grandiflora 'Dawn to Dusk'Nepeta grandiflora ...
Physocarpus opulifolius 'Diabolo'Physocarpus opulif ...
Stipa tenuifoliaStipa tenuifolia
Caryopteris x clandonensis 'Thetis'
Ceanothus impressus
Echinops ritro 'Veitch's Blue'