Boom Chocolatta Hardy Geranium, Cranesbill

Geranium pratense 'Boom Chocolatta' is a hardy perennial with upright stems, dark bronze foliage, and blue-purple flowers held above the leaves. The contrast between its foliage and early-summer flowers makes it a useful accent among green-leaved perennials. ## Size and placement Allow about 24–26 inches of height and 28–30 inches of spread. Plant in full sun or partial shade in well-drained soil; average moisture supports steady growth. Walters Gardens lists the cultivar for USDA zones 4–8 and notes its refined, vigorous habit. ## Flowers and foliage The flowers begin in early summer, while the rounded, deeply divided leaves provide dark bronze color through the growing season. Use it in a sunny border, mixed perennial bed, or container where the foliage can be seen alongside lighter plants. Its flowers are bee-friendly, according to the breeder’s profile. ## Maintenance After flowering, cut the plant back to encourage fresh growth and reduce self-seeding. Keep the foliage from staying wet overnight where possible, since fungal leaf spots and root rot can affect geraniums. See the [Walters Gardens profile](https://www.waltersgardens.com/variety.php?ID=GERBO) for dimensions, growing conditions, and care details.