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Parrot?s feather or diamond milfoil is a rhizomatous aquatic perennial that has both submerged and emergent feathery leaves that appear in whorls along the stems. Stems can grow to 6? long. Submerged foliage is chartreuse. Emergent foliage is dark blue green. Emergent stems trail to shoreline and will root in the banks, making this a good transitional plant for margins of water gardens or ponds. Tiny yellowish-green flowers bloom in summer from the leaf axils of emergent stems. Submerged foliage serves as shelter for fish, helps remove excess nutrients and acts as an oxygenator. Native to South America, Australia and New Zealand, this plant has escaped cultivation and has naturalized throughout much of North America.
Winter hardy to USDA Zones 6-10. In water gardens, grow in containers submerged in up to 6″ of water or on wet banks. Also may be grown in the shallow margins of a pond. Best in organically rich soils in full sun to part shade. Thin clumps as needed. Cuttings will root easily. Cut stems back below water line in fall. Foliage dies back to the rhizomes in winter.
