Superbe plante pour massifs à Fl. bleues.

Semis en place préférable au printemps. Semer à 3mm de profondeur en rang écartés de 30cm, dans un sol bien travaillé et finement ratissé. Eclaircir les semis à 15cm. Cultiver au soleil, préfèrent un sol riche et profond, mais se contentent de la plupart des sols de jardin.

Transplant the seedlings into 7.5cm (3in) pots when large enough to handle, and grow on cool and well lit approximately 15-18C (60-65F). In Summer or Autumn plant out where they are to flower 45cm (18in) apart in full sun and ordinary well drained garden soil. Keep well watered until they are established.

Cut the stems down to ground level in winter and mulch with compost.