Geranium pratense 'Summer Skies' is a much-admired hardy geranium, with charming double, soft lavender-blue flowers with yellow centre in early to mid-summer. Strong-growing and upright, it forms an impressive clump of deeply divided green foliage and makes a striking statement in mixed borders. Fully hardy and easy to grow, it performs best in sun or light shade and suits cottage-style and perennial planting schemes.