The 215th prohibition is that we are forbidden from planting a combination of species of seeds (kilai z'raim).

The source of this commandment is G‑d's statement,1 "Do not plant your field with kilayim."

This prohibition of planting a mixture of seeds applies only in Eretz Yisroel, where one is punished by lashes for violating this Biblical prohibition. Outside Eretz Yisroel, however, it is permissible.

The details of this mitzvah are explained in tractate Kilayim.