Broccoli is good because it forms a head not only on the central shoot, but also on the side shoots. And after cutting the central (largest) inflorescence, new ones begin to develop from the side buds. They are smaller in size, but you can cut them off until the frosts. Although autumn frosts are not terrible for broccoli. The main thing is not to miss the moment and remove the inflorescences before they open. When yellow flowers appear on them, this means that the cabbage is overripe and unfit for food. Such inflorescences should be removed and wait until new ones appear from other sinuses.