> Can you really easily cross-bred modern specimens of broccoli and kale? I know that one particular pairing of broccoli and kale did cross-breed, in my father

> Can you really easily cross-bred modern specimens of broccoli and kale? I know that one particular pairing of broccoli and kale did cross-breed, in my father's garden, many years ago. At least, that's what he (a PhD biologist) told me. They shot up into flower stalks right away, and neither leaves nor florets were edible. Broccoli and cauliflower would interbreed, as well. Sometimes their piebald florets were edible, but usually they were terribly bitter. They were a curiousity, no more.