Agapanthus 39northern star39 is very free flowering forming masses of umbel flower heads all through summer the stunning deep blue flowers have a purple stripe the same as the purple base of the semi45evergreen foliage a tall african blue lily ideal in the middle of your garden39s border and planted in large clumps so the blooms rise above the other hardy perennials agapanthus flowers are also superb for cutting 45 if you can bear to33 height 90cm 40353441 sprea