How to Grow Fennel (Herb)

Updated June 2026

A cool-season leafy for the home garden across the warmer US.

What it looks like as it grows

Fennel (Herb) is a rewarding cool-season crop for backyard growers.

When to plant

Fennel (Herb) is a cool-season crop. In the South and Southwest, plant in fall through winter when the heat eases. See your region on the fennel (herb) page for exact timing.

Varieties

Bronze Fennel, Feathery anise foliage (Botanical Interests)

How to grow it

Sun & soil: full sun, rich well-drained soil with even moisture.
Spacing: about 12 in between plants.
Sowing: barely cover the seed.
Water: roughly 1.1 gal per plant every 3 days in hot weather.

Pests & problems

Watch for Aphids. In humid regions, Leaf spot can appear, so space for airflow and water at the roots in the morning.

Harvest

Fennel (Herb) is usually ready to harvest in about 3 months. Pick regularly to keep plants productive.

When to plant in your region

Pick your region to see exactly when to plant fennel (herb) where you garden.

See what to plant this month

Pick your region for a month-by-month calendar tuned to your climate.

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