Salvia nemerosa Caradonna
Deep blue spires of long lasting flowers over nearly black stems make this bee and butterfly friendly perennial a garden must have. It's certainly one of our favourites.
Preferring well drained but moist soil in decent sunlight, this hardy perennial makes a very striking addition to the herbaceous border, especially when planted en masse.
Aromatic foliage 0.5m high by 0.3m spread