Growing Fennel in Zone 8b

Zone 8b has warm winters and an extended growing season — excellent for heat-loving crops like Fennel. Last frost: Mar 22. First frost: Nov 10.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 22Nov 10

Season: Mar 22 – Nov 10 (233 days) · Succession: plant every 3 weeks (up to 8x)

Zone8b

Last FrostMar 22

First FrostNov 10

Season Length233 days

Days to Harvest65

SunFull Sun

Frost ToleranceLight

Spacing12/sqft

When to Plant Fennel in Zone 8b

Start Seeds Indoors: Feb 22

Start Fennel seeds indoors around Feb 22 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 7–14 days.

Transplant Outdoors: Mar 15

Transplant Fennel seedlings outdoors after Mar 15. Wait until soil temperature reaches 50°F. Space plants at 12/sqft. Harden off plants for a week before moving outside.

Harvest: May 9

First harvest approximately May 9 (~55 days from transplant). Continue harvesting until first frost (Nov 10).

Fall Planting: Sep 1

For a fall harvest, plant Fennel around Sep 1 (10 weeks before first frost).

Companion Planting

✅ Dill

❌ Tomatoes❌ Peppers❌ Beans❌ Eggplant❌ Kohlrabi

Fennel in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Frequently Asked Questions

When should I plant Fennel in Zone 8b?

Start Fennel seeds indoors around Feb 22. Transplant outdoors after Mar 15. Expect first harvest around May 9.

What is the last frost date for Zone 8b?

The average last spring frost date for Zone 8b is Mar 22. The first fall frost averages Nov 10, giving a 233-day growing season.

Can I grow Fennel in Zone 8b?

Yes. Fennel needs 65 days to harvest. Zone 8b has a 233-day growing season, which is sufficient. You can plant up to 8 successions.

What is the best month to plant Fennel in Zone 8b?

The best time to start Fennel in Zone 8b is Feb. Begin seeds indoors around Feb 22, then transplant outdoors after the last frost date of Mar 22.

What companion plants grow well with Fennel?

Good companion plants for Fennel include Dill. Avoid planting Fennel near Tomatoes, Peppers, Beans, Eggplant.

How long does Fennel take to harvest?

Fennel takes approximately 65 days from planting to harvest. In Zone 8b, expect your first harvest around May 9.

Plan Your Fennel Garden

Track Fennel from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Fennel Growing Guide