Red Thai

Family: Lamiaceae Herb

Aromatic as a warm breeze—Red Thai holy basil releases a vivid, peppery-sweet fragrance with a distinctly spicy edge as soon as the leaves are bruised.

Tender, deep burgundy stems and leaves carry a lush, velvety texture and a bright, herbal bite that shines in fresh sprigs, quick infusions, and bold sauces; its heat is lively rather than harsh, making it a favorite for gardeners who love to grow flavor-forward greens. Ready in about 30 days, Red Thai brings fast, tropical vigor to beds and containers, rewarding you with a steady harvest of fragrant foliage.

Light: Full SunMaturity: 30 DaysHabit: Upright

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Mar 28th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Jun 6th
Harvest Begins	Jul 6th
Harvest Ends	Oct 16th

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

Culinary Notes

Chef's Note

Red Thai holy basil has that holy-basil thing—peppery-sweet perfume that blooms fast when bruised, then lands as warm, clean heat. Use it late and aggressively (torn, not chopped) so the velvety leaves stay aromatic and don’t go dull in the pan.

Best Uses

torn-leaf stir-fries for a last-second fragrant punch
Thai-style basil chicken or pork where the heat hugs the sauce
hot quick infusions (tea/syrup) for a spicy-floral lift
bruise-and-splash finishing herb for noodles and broths

Flavor Profile

peppery-sweet aroma lively spicy heat (warm, not harsh) bright herbal bite with a velvety leaf texture

Kitchen Pairings

garlic fish sauce lime coconut milk chili oil chicken or pork

Frequently Asked Questions

What’s the most common pest problem for Ocimum tenuiflorum (Holy Red, Red Thai), and how do I control it?

Watch for spider mites and whiteflies, which can quickly stunt sweet basil–type leaves and cause stippling or sticky residue. Start by spraying the undersides of leaves with a strong water jet, then use insecticidal soap or neem, repeating every 5–7 days until you see no new damage. Keep plants well-spaced for airflow because Lamiaceae herbs develop mite outbreaks faster in hot, dry, stagnant conditions.

How often should I water Ocimum tenuiflorum during the main growing phase?

Water when the top 1 inch of soil feels dry, aiming for consistently moist (not soggy) soil while the plant is actively growing. During warm, full-sun conditions, this is often about 1–2 times per week, but adjust to rainfall and pot vs. in-ground drainage—never let water pool around the roots. Mulch lightly if you want steadier moisture, which helps prevent leaf stress and bolting.

How can I tell when Red Thai (Ocimum tenuiflorum) is ready to harvest?

Begin harvesting around 30 days after sowing when plants are bushy with multiple sets of true leaves and stems are flexible. Harvest by pinching or snipping the top 2–4 inches (or taking individual leaf clusters) just above a pair of leaves to encourage branching. If you see early flowering or tight bud formation, harvest immediately because leaf flavor quality declines as it starts to bolt.