SproutSmart
SproutSmart™ Intelligent Garden Sowing

Sweet Thai

Basil
Zone 11a Save Garden

Planting Schedule

Add Sweet Thai to your garden to build a schedule and get reminders.
Botanical illustration of Sweet Thai
45d to harvest

Sweet Thai basil opens with a vivid, licorice-cool fragrance and a bright, sweet-herbal flavor that lingers like fresh green tea on the palate. Leaves are tender and glossy, with a gently serrated edge and a slender, upright habit that keeps foliage lush and aromatic through the season. Grow Sweet Thai for bold Thai-style garnishes, fragrant sauces, and quick pickling-style infusions where its distinctive sweetness and aromatic lift shine most.

Crop Dates

Growing note: In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).
MilestoneDate
Start Indoors—
ClimateFrost-Free Climate
Transplant / Sow OutdoorsOct 1st
Harvest BeginsNov 15th
Harvest EndsFeb 28th

Crop Details

TraitValue
Days to Maturity45
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)60
Min Night Temp (°F)50
Harden Off (days)10

Today's Conditions

Outdoor planting for Sweet Thai in Zone 11a typically begins around 2026-10-01. Wait until soil reaches at least 60°F before transplanting Sweet Thai.

Garden Alerts

In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).

Recommended Companions

Moonsong Deep Orange Marigold
View Details →
Pluto Basil Basil
View Details →
Leisure Cilantro
View Details →
Fino Verde Basil
View Details →
African Marigold Marigold
View Details →
Cruiser Cilantro
View Details →

Frequently Asked Questions

What pest or disease is most common on Ocimum basilicum (Thai basil), and how do I treat it?
Look out for downy mildew, which often shows as yellow patches on the top of leaves with fuzzy gray-purple growth underneath. Remove affected leaves immediately, improve airflow around plants, and water at the soil level early in the day so foliage dries fast; avoid wetting the leaf surface. If it keeps spreading, switch to a labeled fungicide for downy mildew on basil and repeat as directed.
How can I tell when Sweet Thai (Ocimum basilicum) is ready to harvest?
Harvest when plants reach about 6–8 inches tall and have multiple sets of fully formed leaves, usually around 40–50 days after sowing. Pick by snipping the top 2–4 inches (above a leaf pair) to encourage branching; avoid stripping all leaves at once. The best flavor comes from fresh, young leaves before the plant starts putting up heavy flowering stems.
Botanical illustration of Sweet Thai

Sweet Thai basil opens with a vivid, licorice-cool fragrance and a bright, sweet-herbal flavor that lingers like fresh green tea on the palate. Leaves are tender and glossy, with a gently serrated edge and a slender, upright habit that keeps foliage lush and aromatic through the season. Grow Sweet Thai for bold Thai-style garnishes, fragrant sauces, and quick pickling-style infusions where its distinctive sweetness and aromatic lift shine most.

Today's Conditions

Outdoor planting for Sweet Thai in Zone 11a typically begins around 2026-10-01. Wait until soil reaches at least 60°F before transplanting Sweet Thai.

Garden Alerts

In frost-free Zone 11a, grow this cool-season crop during the cooler dry season (October–February).

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 60°F for reliable germination and early growth.

Expert Note

Sow thinly and keep soil consistently moist; the licorice-aroma purple-stem look is best in cool weather (avoid heat spikes).