Variegated slender sweet flag , Mondo variegate
This miniature, semi-evergreen Japanese plant is best grown in a special basket for water plants, being gently placed in shallow water at the edge of a pond, or directly in the soil in a bog garden. It then sends up fans of compact leaves with cream and yellow stripes.Snip or clear away any leaves which have died down in the autumn, when it goes dormant, to prevent any silting up. When the plant threatens to spill out of its container, split the rhizome, potting each section in its own basket.