So what happens when you let one of those very familiar broccoli heads go?
You get an explosion of little yellow flowers.
I love to eat fresh broccoli, but every winter I let at least one plant escape my dinner plate.
Why? Seeds and bees.
I always need seeds for next season and winter time is a hard time for bees to find food.
Here is a post showing seeds.
Here is a video of bees feasting on broccoli flowers.