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Very similar to 'Black and Bloom' but only grows to a height of 80cm so would suit smaller gardens.
A clump forming perennial, producing numerous spikes of vivid cobalt blue flowers that contrast with a black calyx. Flowering mid-summer to November. Half Hardy. Forms a tuberous root system so mulch like you would a dahlia in winter and choose a sheltered location.
Requires free-draining soil and full sun.