Salvia pratensis ‘Twilight Serenade’ – Part of the BALLET series out of Germany, this Salvia features intense violet-blue flowers borne in spires (from June to August) that also show quite well by themselves. These emerge from a dense basal rosette of green leaves and should be deadheaded to prolong the flower display. Attracts hummingbirds. Grows 18-20″ high. Zone 3.
Salvia nemerosa ‘Pink Friesland’ – A rich rose-pink version of ‘East Friesland’ (an unusual colour for Salvia) that flowers from June through to September with deadheading. It has grey-green foliage and prefers a part to full sun exposure with good soil drainage (particularly in winter). Divide every 3 to 4 years for best vigour. Grows 12-18″ high and wide. Hardy to zone 3.
Salvia nemerosa ‘Sensation Deep Blue’ (syn. ‘Sensation Deep Blue Improved’) – Part of the SENSATION series out of Germany, it bears May to July blooms of a vibrant blue on shorter spires. This is a compact cultivar and quite floriferous. Try pairing with Geranium cinereum ‘Ballerina’ in the foreground for a nice display. Grows 12″ high and wide. Hardy to zone 4.
Salvia x sylvestris ‘Snow Hill’ (syn. ‘Schneehugel’, ‘Salvia x superba ‘Snow Hill’) – A superb choice for an Alba garden, this sport of Salvia x sylvestris ‘Blue Hill’ has pure white spires from June to September, providing you do a little deadheading. It has matte olive green foliage and will attract the butterflies to your garden. Grows 18-20″ high by 20-24″ wide. Hardy to zone 3.
Salvia nemerosa ‘East Friesland’ (syn. ‘Ostfriesland’) – This RHS Award of Garden Merit winner features violet-purple 18″ long spires from June to September over grey-green foliage. It makes a good cut flower and looks wonderful in the garden when paired with either Coreopsis verticillata ‘Moonbeam’ or Zagreb’. Drought tolerant. Grows 16-18″ high by 18-24″ wide. Hardy to zone 3.