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A wonderfully free-flowering hardy perennial, Iris pseudacorus bastardii is a British native marginal aquatic that swiftly produces dense clumps of grey-green, strappy foliage. From May to June, branching stems bear subtle, cream-yellow flowers. An easy-to-grow Yellow Flag Iris which is ideal for bog gardens and pond or stream margins. Height: 120cm (48). Spread: 30cm (12). Planting depth: Zones 1, 2 & 3 to 20cm (8) below water level.