Six-pack—ground cover plants—cranesbill Geranium 'Rozanne' Blue - Hardy plantBlue flowers for months on end! The cranesbill 'Rozanne' (Geranium) blooms from spring to autumn. This ground cover plant is gorgeous in a border and is easy to combine with most other plants. The butterflies and bees attracted by the cranesbill make the garden an even lovelier place to be. You can plant this hardy perennial all year round. Place it in a spot in the sun and water it more during dry spells. Beautiful blue in the garden!