Thai Towers

Basil

30d to harvest

Fragrant as a summer breeze, ‘Thai Towers’ basil rises with upright, tower-like stems that hold their form beautifully—an aromatic feast of sweet anise and bright clove over a clean, peppery green snap. Leaves are small to medium and tender, with a softly crinkled, velvety surface that releases its signature perfume at every touch. Grow ‘Thai Towers’ for fresh, fragrant use and for bold, aromatic sauces where its lively flavor and upright habit shine.

Crop Dates

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

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Oct 31st
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	30
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	10

Frequently Asked Questions

What pest or disease is most likely on Ocimum basilicum (Thai Towers) indoors or in warm weather, and how do I treat it?

Basil downy mildew and leaf-spotting fungi can quickly spread on Ocimum basilicum, especially with warm, humid conditions and wet leaves. Start by removing affected leaves, then increase airflow and water only at the soil line; avoid splashing the foliage. If the disease keeps progressing, switch to a labeled fungicide appropriate for basil (follow the label exactly) and stop harvesting until the re-entry interval is met.

How often should I water Thai Towers basil during its main growth (about weeks 2–4)?

Keep the soil consistently evenly moist during active leaf growth, but never soggy; aim for slightly damp soil 1 inch down. In summer full-sun conditions, this is often about once per day to every other day in containers, while in-ground beds may need 2–4 deep waterings per week depending on rainfall. If leaves wilt in the afternoon and rebound overnight, water more steadily; if stems stay wet and soil smells sour, reduce watering.

How do I tell when Thai Towers basil is ready to harvest?

Harvest when plants are about 30 days from sowing/transplanting and have developed several sets of true leaves (typically 6–8 inches tall). Pinch or cut just above a leaf node to encourage branching; take no more than one-third of the plant at a time. For best flavor, harvest in the morning before heat triggers bitterness, and keep harvesting regularly to delay flowering.