Geranium pratense 'Boom Chocolatta' (Meadow Geranium 'Boom Chocolatta') is a hardy cranesbill prized for rich, chocolate-bronze foliage topped by clear blue-purple flowers. You get strong color contrast from spring through summer, even when it is not in peak bloom.
Plant it in full sun to part shade for best flowering and the deepest foliage color. Give it evenly moist, well-drained soil, especially during establishment, then water during extended dry spells. Mature plants form an upright clump about 24-26 inches tall and 28-32 inches wide, making it an easy mid-border filler or a bold accent among lighter green leaves.
After the main flush of flowers, you can deadhead or shear lightly to refresh foliage and encourage a tidier look later in the season. Divide clumps in spring or early fall if you want to increase your planting or maintain vigor. This selection is also a good choice where browsing pressure is a concern, as it is often left alone by deer and rabbits.
Use 'Boom Chocolatta' to edge a border, weave through mixed perennial beds, or anchor containers with its dark leaves. Pair it with silver foliage, chartreuse companions, or warm-toned blooms to highlight the blue-purple flowers and bronze leaves.