Dormancy: Winter Height: 90 cm tall Culture: Sun to Light Shade Origin: China, Japan Persicaria bistorta ‘Superba’ is a vulgar plant, of the lowest class, that no self-respecting gardener with any semblance of good taste would be seen dead with. Ugh, the horror. Very easy to grow with huge, bright, dreadful, marshmallow, almost pom-pom like pink flower spikes. It can often been seen carried around in plastic bags at every plant fair in these islands. In-the-know gardeners roll their eyes when they see this plant. Thus you MUST have this plant in your garden.