When choosing a companion plant for your broccoli, it’s good to know what times your broccoli will thrive and what its specific needs will be, so that you can harvest both plants at the same time and so you’ll know that they won’t be fighting over resources. Broccoli likes a steady cool temperature – this is why most of your commercial broccoli comes from the California central coastal area. It also likes a well-draining soil medium that falls somewhere in-between a sandy and clay loam, so that it will stay moist but not ‘soaked’. After that, you’ll want a moderate nitrogen level, and it prefers a pH between 6.0 and 7.0 to grow up healthy and strong.