Over back hill Lithodora Heavenly Blue is a low, mat-forming evergreen plant with small, hairy leaves. Introduced into the U. as lithospermum around this low growing alpine hosts beautiful sky blue gentian-like flowers from May to September
Perennial Sage Salvia is a wonderfully long bloomer. It starts flowering in early summer and continues through early autumn if you keep cutting the faded flowers off. It's also one of the most carefree perennials you pick for your garden.