When should I plant Thai Basil in Zone 9b?

Start Thai Basil seeds indoors around Jan 27. Transplant outdoors after Mar 24. Expect first harvest around Apr 23.

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 Thai Basil in Zone 9b?

Yes. Thai Basil needs 40 days to harvest. Zone 9b has a 250-day growing season, which is sufficient. You can plant up to 10 successions.

Growing Thai Basil in Zone 9b

Zone 9b has warm winters and an extended growing season -- excellent for heat-loving crops like Thai Basil. Darrera gelada: Mar 10. Primera gelada: Nov 15.

Planting Calendar

Indoor

Outdoor

Harvest

Jan 27Nov 15

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

Zona9b

Darrera geladaMar 10

Primera geladaNov 15

Temporada250 dies

Collita40 dies

SolSol Ple

When to Plant Thai Basil in Zone 9b

Start Seeds Indoors: Jan 27

Start Thai Basil seeds indoors around Jan 27 (6 setmanes abans de l’última gelada). Optimal germination temperature: 80F. Germinates in 5-10 days.

Transplant Outdoors: Mar 24

Transplant Thai Basil seedlings outdoors after Mar 24. Wait until soil temperature reaches 60F. Space plants at 4/m² (15cm espaiat). Harden off plants for a week before moving outside.

Harvest: Apr 23

First harvest approximately Apr 23 (~30 dies from transplant). Continue harvesting until first frost (Nov 15).

Thai Basil 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

Plan Your Garden Thai Basil

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

Start Free Thai Basil Growing Guide