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STOP throwing away your green onion roots! You can regrow them at home! After cooking, save the white ends, leaving a little white base and the roots attached. Set them root-side down in a clean glass, with enough water to cover the roots and keep the green tops above the water. Give them bright light and refresh the water every couple of days. New shoots can appear in days, but that's only the start. Once growth is underway, move the ends into moist potting soil in a small pot with drainage. Place it by a sunny window and keep the soil lightly moist. Harvestable greens take longer than a few days; shoots are just the start, and growth depends on light and conditions. Those saved ends can give you fresh greens again. Follow Sonix Urban Sprout for more easy gardening hacks!