Basil Seeds,
Thai Holy Kaprao

3.830 ReviewsSKU #HB142 · 100 seeds
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Description

(Ocimum tenuiflorum). This authentic Thai basil, revered in Thailand and still difficult to find outside Asia, offers a bolder and less sweet flavor than Thai Sweet basil. Its slightly hairy leaves carry a piquant character with notes of clove and black pepper, giving real depth to savory dishes. The flavor is intense, unmistakable, and deeply tied to traditional Thai cooking. A distinctive basil for serious cooks who want the true thing, not the watered-down version.

Plant Details

Botanical Name
Ocimum tenuiflorum
Life Cycle
Annual
Sun Requirement
Full sun
Days to Germinate
10–12
Days to Maturity
60–75
Planting Depth
¼ in.
Plant Spacing
6–8 in.
Ideal Temperature
70–85°F
Frost Hardy
No

Growing Guide

When to Grow

Start seeds indoors 4-6 weeks before the last frost date in your area. Transplant them into the garden once nighttime temperatures consistently remain above 50 F. Alternatively, in warmer climates, you can direct sow the seeds outdoors after the last frost. Check your local area’s frost dates to time your planting accurately. Thai Holy Kaprao basil grows best during the warm summer months and will struggle in cooler conditions. Learn more about your region’s frost dates by checking out our blog post, ‘Our Experts Answer Questions, Share Resources.’

How to Sow and Plant

Surface sow seeds in seed trays or directly into garden soil after frost danger has passed. For indoor starts, use a seed-starting mix and keep the soil consistently moist with temperatures around 70 to 85°F for germination. Space plants 6 to 8 inches apart in the garden to allow airflow and adequate growth. Before transplanting seedlings, harden them off by gradually exposing them to outdoor conditions for 7 to 10 days.

How to Grow

Water Thai Holy Kaprao basil regularly, keeping the soil evenly moist but not soggy. Fertilize every 2 to 4 weeks with a balanced, all-purpose fertilizer or enrich the soil with compost before planting. Regularly pinch back the plant's top leaves to encourage bushier growth and delay flowering. To protect against pests like aphids and spider mites, use organic pest control methods such as neem oil or insecticidal soap. Companion planting with tomatoes or peppers can also help deter pests naturally.

How to Save Seeds

  • Flower heads mature progressively from the bottom of the stem to the top.
  • When the bottom seed head starts to turn brown, the stem can be cut and allowed to dry away from direct sun in a well-ventilated area.
  • Rub dried raceme over a fine wire mesh and winnow off the chaff.
  • Place chaff in a bowl and carefully swirl contents around. Seeds will gather at the bottom of the bowl.
  • Tip the bowl so that the chaff can be discarded and blow the rest out carefully.

FAQ

Can I grow Thai Holy Kaprao basil indoors?

Yes, Thai Holy basil can be grown indoors with adequate sunlight (at least 6 to 12 hours daily) or supplemental grow lights.

How long does Thai Holy Kaprao basil take to mature?

It matures in 60 to 75 days, but you can begin harvesting leaves once the plant reaches 6 to 8 inches tall, typically about 3 to 4 weeks after germination.

How do I keep Thai Holy Kaprao basil from bolting?

Regularly prune or pinch off the tops of the plants to prevent flowering and extend the harvest window.

Browse our full range of basil seeds.

Customer reviews

3.8 / 5 30 Reviews

What gardeners are saying

  • Thai kitchen staple: The basil for pad kaprao, stir-fries and spicy fried rice.

  • Distinctive fragrance: Spicy, peppery scent that is nothing like sweet basil.

  • Loves heat: Takes off in hot sun and self-seeds the next year.

  • Tulsi tea too: Dried for tea; some grow it for its calming effect.

  • Heads up: Slow to sprout without warm soil; some find the flavor mild.

More to grow!

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