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Iris louisiana 'Her Highness' is a marginal aquatic that produces clumps of sturdy, upright foliage. From May to July, the stems bear elegant cream-white flowers flashed with gold, to create an eye-catching display. An easy-to-grow hardy perennial which requires very little maintenance. This Water Iris is ideal for shallow pond margins where the blooms reflect in the still water, beautifully. Height: 90cm (36). Spread: 30cm (12). Planting depth: Zones 1, 2 & 3 to 20cm (8) below water level.