Beautiful blue flowers with a white heart to brighten your garden from May to September.  Wild bees and other pollinators are in decline. This plant is recommended specifically by the RHS as part of the RHS plants for pollinators scheme. This scheme helps gardeners to easily identify plants that encourage bees and pollinators back into the garden. The light blue flowers with an almost white heart bloom for a long time from May to September. It prefers a sunny position in the border and can be combined with other perennials. A low maintenance plant that only needs lime additives once in a while.