This low lying evergreen shrub is covered in a profusion of star shaped brilliant blue flowers throughout late spring and summer lithodora diffusa 39heavenly blue39 looks great in rockeries containers and along the edge of borders especially alongside other plants with blue purple and white flowers it grows well in full sun and partial shade the royal horticultural society has awarded this plant its award of garden merit height 15cm 4063441 spread 60cm 40243441