Flower preservation techniques help maintain the beauty of flowers for an extended period. Common methods include air drying, where flowers are hung upside down in a cool, dark place, allowing moisture to evaporate naturally. Another popular technique is pressing, which involves placing flowers between heavy books or in a flower press to flatten and dry them. Additionally, flowers can be preserved using silica gel, which absorbs moisture quickly, or by submerging them in glycerin mixed with water. These methods help retain the color and shape of the flowers, making them suitable for decorative purposes or keepsakes.