The black color of dried osmanthus fragrans is mainly due to the cultivation of flowers. If you don't want it to turn black, you can dry it in the oven. Soak osmanthus in water first, take it out and rinse it several times, then control the water to dry and pick out the dead flowers and pedicels inside. After picking, it can be baked in the oven. After drying, take it out and let it cool. If there is no oven, you can also consider air drying, but you should pad paper.