Caryopteris x clandonensis 39grand bleu39 is a french45bred variety spectacular in late summer and autumn when its intense blue flowers smother the tips of each stem 39grand bleu39 has a delightful rounded habit that forms a neat deciduous shrub in mixed borders and its nectar45rich blooms are a magnet for pollinating insects in wildlife areas also perfect for invigorating fading borders with a splash of late45season colour height and spread 100cm 40393441