Perennials

Geranium pratense 'Boom Chocolatta'

Boom Chocolatta cranesbill

'Boom Chocolatta' Hardy Geranium, Cranesbill Geranium pratense, Photo courtesy of Proven Winners

Blue-purple flowers contrast with rich bronze foliage on an upright mound. Adds dark-leaved contrast among green border plants. It is adaptable to well-drained soil; tolerates alkaline conditions.

At a glance

Sun: Full sun to part shade
Mature size: 24–26 in. tall × 28–30 in. wide
Water: Moderate; well drained
Hardiness: USDA zones 4–8
Bloom: Blue-purple; early–late summer.

Sizes & prices

#1$22.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Resistance & tolerances

Drought: Tolerates short dry periods once established.
Wet soil: Avoid waterlogged soil.
Deer & rabbits: Resistant, not browse-proof.

Resistance is not a guarantee; deer and rabbits may browse any plant.

Pollinators & wildlife

Attracts: Bees

Growing & care

Pruning: Cut back after flowering for fresh foliage.

Sources & photo credits

Walters Gardens

Royal Horticultural Society

Photo: 'Boom Chocolatta' Hardy Geranium, Cranesbill Geranium pratense, Photo courtesy of Proven Winners · Authorized promotional use

Reviewed September 19, 2026. Growing conditions vary by location.