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🍠 Growing Sweet Potato in Zone 8b

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

Planting Calendar

Indoor

Outdoor

Harvest

Jan 25Nov 10

Season: Mar 22 – Nov 10 (233 days)

Zone8b

Last FrostMar 22

First FrostNov 10

Season Length233 days

Days to Harvest100

SunFull Sun

Frost ToleranceNone

Spacing1/sqft (12" apart)

When to Plant Sweet Potato in Zone 8b

Start Seeds Indoors: Jan 25

Start Sweet Potato seeds indoors around Jan 25 (8 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 14–21 days.

Transplant Outdoors: Apr 12

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

Harvest: Jul 11

First harvest approximately Jul 11 (~90 days from transplant). Continue harvesting until first frost (Nov 10).

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 8b?

Start Sweet Potato seeds indoors around Jan 25. Transplant outdoors after Apr 12. Expect first harvest around Jul 11.

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 Sweet Potato in Zone 8b?

Yes. Sweet Potato needs 100 days to harvest. Zone 8b has a 233-day growing season, which is sufficient.

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

The best time to start Sweet Potato in Zone 8b is Jan. Begin seeds indoors around Jan 25, then transplant outdoors after the last frost date of Mar 22.

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 8b, expect your first harvest around Jul 11.

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