🍠

🍠 Growing Sweet Potato in Zone 12b

Zone 12b has a year-round growing season. Sweet Potato can be planted almost any time with proper planning. Last frost: Jan 1. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Nov 6Dec 31

Season: Jan 1 – Dec 31 (364 days)

Zone12b

Last FrostJan 1

First FrostDec 31

Season Length364 days

Days to Harvest100

SunFull Sun

Frost ToleranceNone

Spacing1/sqft (12" apart)

When to Plant Sweet Potato in Zone 12b

Start Seeds Indoors: Nov 6

Start Sweet Potato seeds indoors around Nov 6 (8 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 14–21 days.

Transplant Outdoors: Jan 22

Transplant Sweet Potato seedlings outdoors after Jan 22. Wait until soil temperature reaches 65°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Apr 22

First harvest approximately Apr 22 (~90 days from transplant). Continue harvesting until first frost (Dec 31).

Companion Planting

✅ Dill ✅ Oregano ✅ Thyme

Sweet Potato 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 Sweet Potato in Zone 12b?

Start Sweet Potato seeds indoors around Nov 6. Transplant outdoors after Jan 22. Expect first harvest around Apr 22.

What is the last frost date for Zone 12b?

The average last spring frost date for Zone 12b is Jan 1. The first fall frost averages Dec 31, giving a 364-day growing season.

Can I grow Sweet Potato in Zone 12b?

Yes. Sweet Potato needs 100 days to harvest. Zone 12b has a 364-day growing season, which is sufficient.

What is the best month to plant Sweet Potato in Zone 12b?

The best time to start Sweet Potato in Zone 12b is Nov. Begin seeds indoors around Nov 6, then transplant outdoors after the last frost date of Jan 1.

What companion plants grow well with Sweet Potato?

Good companion plants for Sweet Potato include Dill, Oregano, Thyme.

How long does Sweet Potato take to harvest?

Sweet Potato takes approximately 100 days from planting to harvest. In Zone 12b, expect your first harvest around Apr 22.

Plan Your Sweet Potato Garden

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

Start Free Sweet Potato Growing Guide