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Knotweed, also known as Japanese knotweed, is a leafy plant with bamboo-like stems and clusters of small, white or pinkish flowers. While often considered an invasive species, young shoots of knotweed are edible and offer a tart, rhubarb-like flavor with a slightly crunchy texture when cooked. Mature knotweed stems become tough and fibrous, so only the young, tender shoots are used in culinary applications. Harvesting should be done responsibly, and consumption may not be suitable for everyone. Use caution and research before eating.

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Store knotted in a cool, dry place away from direct sunlight. Ensure it's in an airtight container or bag to prevent moisture absorption, which can lead to spoilage or mold growth. Properly stored, it can last for several months. Check regularly for any signs of spoilage, such as discoloration or an off odor.