the yield substantially. It also prefers rich, well-drained soil. The seed is harvested by cutting the flower heads off the stalks when the seed is beginning to ripen. The seed heads are placed upside down in a paper bag and left in a warm, dry place for a week. The seeds then separate from the stems easily for storage in an airtight container.

These plants, like their fennel and parsley relatives, often are eaten by black swallowtail caterpillars in areas where that species occurs. For this