Ceratostigma can be evergreen or deciduous shrubs or herbaceous perennials, with simple leaves which usually colour well in autumn, and short terminal or axillary spikes of salver-shaped blue flowers in late summer and autumn
Forest Blue is a bushy, spreading deciduous shrub to 60cm tall, with lance-shaped leaves turning red in autumn, and small clusters of rich blue, plumbago-like flowers 2cm wide in late summer and autumn