An absolutely gorgeous salvia, ''Blue Enigma'' produces electric blue flowers on tall stems amidst lush bright green foliage from mid-Summer right through into Winter. Cut stems back just by half after flowering as this helps to protect the crown of the plant , providing protection from severe frosts in winter. Spreads very politely underground (definitely not invasive). Sun, well-drained soil. 1-1.5m x 90cm approximately.