Find a location in the garden with full sun and well-draining soil.
Dig a 1/4-inch trench in your soil and spread fennel seed into the hole. Cover the seed with 1/4 inch of soil.
Moisten the soil, making sure it is not overly wet or forming puddles.
Thin the plants so they are spaced 9 to 12 inches apart.
Water the plant regularly to keep the soil moist.
Harvest the plant after 10 weeks of growth.