Celery bulbs can be found in the cellar, overwinter in a cold cold frame or outdoors.
They also keep the heart leaves in the wrap. However, the remains of the other leaves must be carefully removed. However, you must not damage the bulb head. The roots are shortened with a sharp knife to a few centimeters below the tubers. In the cellar, the tubers are packed tightly together in sand, and only that deep, that the heart leaves and also the bulb head remain free. Proceed in the same way in the cold frame or outdoors, only that the existing earth is used as the wrapping material. However, the celery bulbs must not be exposed to the frost. That is why the felling in the cold frame or in the open air must be very heavily covered with leaves or other organic material. The immediate vicinity of the impact should also be treated in the same way, so that the frost cannot penetrate from the sides. The celery leaves removed during harvesting can be dried and used as a soup seasoning.