A harvester that determines whether edible crowns are ready to be harvested and selectively harvests the edible crowns that are ready for harvesting. The harvester may include sensors, such as an imaging system, for detecting the edible crowns of individual broccoli plants. Image data from the imaging system may be provided as an input to a machine-learning model to determine a maturity (or immaturity) of the edible crowns. If the edible crowns are ready for harvesting, mechanical pickers harvest the edible crowns. For example, the harvester may include robotic arms having end effectors that cut the edible crowns from a remainder of the broccoli plant. The harvester may be configured to continuously harvest the edible crowns as the harvester moves about a field. In some instances, the harvester may include any number of robotic arms for harvesting the edible crowns across multiple rows of broccoli plants.