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. C. plumbaginoides is a low-growing herbaceous perennial with spreading roots, forming a mat of stems bearing oval leaves which turn red or purple in autumn. Clusters of rich blue flowers from late summer.
Height: 50cm
Spread: 50cm