Salvia nemorosa ‘Blauhugel Blue Hills’ Softer and more nearly true blue than other Salvia nemorosa types this is a wonderful addition to the group. Gentle mauve-blue flower spikes are produced on a tidy low growing plant from spring until winter. Like all the nemorosas we cut this to the ground during winter and also when the first flush of flowers starts to look tired in midsummer. Salvia ‘Blauhugel’ flowers for more than 20 weeks in our dry climate garden. 35cm x 35cm.