If you are looking for deep blue flowers caryopteris x clandonensis 39petit blue39 must be on your list of plants to consider the intense blue flowers act as a magnet to all passing pollinating insects so you get the benefit of your own wildlife party during late summer and early autumn too petit blue has a compact branching habit and glossy green leaves which will form a low spreading shrub to make an attractive feature in sunny positions height 60cm 40243441 spread 90cm