Dwarf Japanese Golden Variegated Sweet Flag to be more accurate. The bright yellow foliage grows 7-14" tall in nice tight clumps and is semi-evergreen. Evergreen in the southern zones usually 7 and warmer with exception to occasional extreme winters. A best seller to beautify the edges of the water in front of and between boulders. Grassy with insignificant flowers. Division should be in spring only. Plant in substrate like calcined clay or loamy soil, do not crowd in stone. Loves full sun to part shade. Zone 5.