The colour within the garden keeps going even as the summer wanes. Cranesbill geranium (Geranium 'Rozanne') has violet blue flowers with small white centers and purple-violet veins which contrast well with the beautifully cut green leaves. This is a vigorous perennial geranium that grows in a mound to 20 inches tall. It is easy to care for and shows exceptional heat tolerance. It will flower almost non-stop from mid-May until frost with minimal burn-out in the heat of Pennsylvania summers. It works well as a "filler plant" - it can fill in beneath higher headed shrubs and perennials, covering both the empty space and the long legs of their neighbors.