Growing Fennel in Zone 9b

Zone 9b has warm winters and an extended growing season — excellent for heat-loving crops like Fennel. Last frost: Mar 10. First frost: Nov 15.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 10Nov 15

Season: Mar 10 – Nov 15 (250 days) · Succession: plant every 3 weeks (up to 8x)

Zone9b

Last FrostMar 10

First FrostNov 15

Season Length250 days

Days to Harvest65

SunFull Sun

Frost ToleranceLight

Spacing12/sqft

When to Plant Fennel in Zone 9b

Start Seeds Indoors: Feb 10

Start Fennel seeds indoors around Feb 10 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 7–14 days.

Transplant Outdoors: Mar 3

Transplant Fennel seedlings outdoors after Mar 3. Wait until soil temperature reaches 50°F. Space plants at 12/sqft. Harden off plants for a week before moving outside.

Harvest: Apr 27

First harvest approximately Apr 27 (~55 days from transplant). Continue harvesting until first frost (Nov 15).

Fall Planting: Sep 6

For a fall harvest, plant Fennel around Sep 6 (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 9b?

Start Fennel seeds indoors around Feb 10. Transplant outdoors after Mar 3. Expect first harvest around Apr 27.

What is the last frost date for Zone 9b?

The average last spring frost date for Zone 9b is Mar 10. The first fall frost averages Nov 15, giving a 250-day growing season.

Can I grow Fennel in Zone 9b?

Yes. Fennel needs 65 days to harvest. Zone 9b has a 250-day growing season, which is sufficient. You can plant up to 8 successions.

What is the best month to plant Fennel in Zone 9b?

The best time to start Fennel in Zone 9b is Feb. Begin seeds indoors around Feb 10, then transplant outdoors after the last frost date of Mar 10.

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 9b, expect your first harvest around Apr 27.

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