Growing Fennel in Zone 11b

Zone 11b has a year-round growing season. Fennel can be planted almost any time with proper planning. Last frost: Jan 15. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 18Dec 31

Season: Jan 15 – Dec 31 (350 days) · Succession: plant every 3 weeks (up to 13x)

Zone11b

Last FrostJan 15

First FrostDec 31

Season Length350 days

Days to Harvest65

SunFull Sun

Frost ToleranceLight

Spacing12/sqft

When to Plant Fennel in Zone 11b

Start Seeds Indoors: Dec 18

Start Fennel seeds indoors around Dec 18 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 7–14 days.

Transplant Outdoors: Jan 8

Transplant Fennel seedlings outdoors after Jan 8. Wait until soil temperature reaches 50°F. Space plants at 12/sqft. Harden off plants for a week before moving outside.

Harvest: Mar 4

First harvest approximately Mar 4 (~55 days from transplant). Continue harvesting until first frost (Dec 31).

Fall Planting: Oct 22

For a fall harvest, plant Fennel around Oct 22 (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 11b?

Start Fennel seeds indoors around Dec 18. Transplant outdoors after Jan 8. Expect first harvest around Mar 4.

What is the last frost date for Zone 11b?

The average last spring frost date for Zone 11b is Jan 15. The first fall frost averages Dec 31, giving a 350-day growing season.

Can I grow Fennel in Zone 11b?

Yes. Fennel needs 65 days to harvest. Zone 11b has a 350-day growing season, which is sufficient. You can plant up to 13 successions.

What is the best month to plant Fennel in Zone 11b?

The best time to start Fennel in Zone 11b is Dec. Begin seeds indoors around Dec 18, then transplant outdoors after the last frost date of Jan 15.

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 11b, expect your first harvest around Mar 4.

Plan Your Fennel Garden

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

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