It was also introduced purposefully in certain areas because of its beauty and value as a healing herb. in the 18 th and 19 th centuries when ships inadvertently carried the plant’s tiny seeds in their ballast and shipments. New plants can also grow from stem fragments when plants are cut or mowed down. This allows the plant to spread about one foot per year. It can reproduce asexually when its thick, fleshy roots produce new shoots. Wind, water and animals spread the seeds, which grow into new seedlings the following spring. A single mature plant can produce more than 2 million seeds per year. Purple loosestrife spreads rapidly from seeds, roots and stem fragments. Purple loosestrife can grow to six feet tall. In autumn, the leaves often turn red for about two weeks before fading and falling off. They are arranged in pairs or whorls of three along the stems. Long or lance-shaped leaves grow up to 4 inches long.
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