Description Persicaria amplexicaulis ‘Blackfield’ A vigorous, upright, clump-forming, deciduous perennial which has large, narrowly ovate to lance-shaped, pointed, dark green leaves. From July to September, slender, long-stalked spikes of dark blood-red flowers are borne from almost black buds. Grow in any moist soil in full sun or part-shade. It will reach a height of 1m and a spread of 70cm.
