affinis ‘Superba’ Short pokers of pink flowers are borne above a thick carpet of very dark, slim leaves that turn red in autumn. 45cm (18in). June-Sept. £4.50 BUY NOW

amplexicaulis ‘Alba’ A fine plant with large leaves smothered by long white spikes of flowers. 120cm (4ft). June-Sept. £5.70 BUY NOW

amplexicaulis 'Atrosanguinea' Taller than 'Firetail', but with the same flowers. £4.50 BUY NOW

amplexicaulis ‘Firetail’ Slender spikes of red-pink flower produced in profusion above a thick carpet of large leaves. 120cm (4ft). June-Sept. £5.70 BUY NOW

amplexicaule 'High Society' Pink flowers. £5.70 BUY NOW

amplexicaule 'Jo & Guido's Form' Intense pink flowers. July-Sept. 150cm (5ft). £5.70 BUY NOW

amplexicaulis ‘Rosea’ Long slender spikes of little pink flowers borne in a sea above a mound of mid green leaves. 120cm (4ft). June-Sept. £5.70 BUY NOW

bistorta carneum Short growing variety with leaves similar to P. bistorta 'Superba', but with short, fat stems of bright red-pink flowers. 30cm (18 in). May-June. £4.50 BUY NOW

bistorta ‘Superba’ Soft pink flowers form fat pokers that sit above lush soft green leaves. Truly weed excluding. 90cm (3ft). May-June. £4.50 BUY NOW