The names, coriander and cilantro are often used interchangeably. However, purists say that coriander refers to the seed. Cilantro refers to the leaves. Now I know!
Some coriander plants are specifically for their seeds. Or after plant has bolted, can collect seeds. Others are grown specifically for the cilantro (leaves).
Some claim that coriander is easy to grow. I have yet to experience that! 🙁