Vigorous and popular, award-winning Lithodora diffusa ‘Grace Ward’ (Gromwell) is a mat-forming evergreen shrub with trailing stems clothed in small, lance-shaped, dark green, hairy leaves. In spring and summer, it is studded with profuse, star-shaped, brilliant deep blue flowers held in terminal clusters.
As for the care of Lithodora, water the plant regularly and don’t allow the soil to become bone dry. However, beware of overwatering and avoid soggy, waterlogged soil. Apply mulch in autumn if you live in a cooler region. Prune Lithodora lightly if it looks straggly, or if the leaves are damaged by winter cold.