BASIL ‘Thai’ Herb Seeds
Botanical Name: Ocimum basilicum var. thyrsiflora
- Stunning ornamental and culinary basil with authentic Thai flavour.
- Sweet, anise-clove fragrance with mint and citrus undertones.
- Perfect for Thai curries, stir-fries, salads, and garnishes.
- Striking green-to-purple foliage with pale lavender flowers.
- Highly decorative and productive in garden beds or pots.
- Slow to bolt and heat tolerant when grown in suitable conditions.
Plant Details
- Plant Type: Warm season annual, frost tender
- Plant Height: Up to 60 cm
Sowing Information
- Germination: 7–14 days
- Depth: Surface sow; press seeds gently into soil without covering heavily
- Position: Full sun preferred; partial shade tolerated in hot climates
- Sow Where: Direct into garden beds or containers, or transplant from seed trays once established
- Soil Type: Fertile, well-draining soil enriched with compost; pH 6.0–7.5
- Spacing: 30–45 cm between plants
Growing Tips
- Keep soil moist but not waterlogged; consistent watering improves flavour and yield.
- Mulch to retain moisture and suppress weeds.
- Pinch off flower buds to extend leaf production and delay bolting.
- Harvest leaves often to encourage bushier plants and prolonged harvest.
- Grow in containers in cooler climates for easy relocation when nights are cold.
- Apply liquid organic fertiliser every 3–4 weeks during growth period.
- Add Thai Basil leaves at the end of cooking to retain aromatic oils and flavour.
Harvest
Harvest leaves from around 80 days after sowing. Pick young shoots and leaves frequently to maintain continuous production.
When to Sow Thai Basil in New Zealand
Thai Basil is best grown during the warmer months in New Zealand. Avoid cold snaps and frost by waiting until soil and air temperatures have warmed in spring.
| NZ Region | Best Sowing Time | Notes |
|---|---|---|
| North Island (Upper) | September – February | Ideal for long growing season; grow in full sun with consistent moisture. |
| North Island (Lower) | October – January | Start indoors if spring is cool; transplant after risk of frost. |
| South Island (Upper) | October – December | Shorter season—grow in pots for flexibility and protection. |
| South Island (Lower) | November – December | Choose warm, sheltered spots and protect from late frosts. |
How to Grow Thai Basil as Microgreens
- Do not pre-soak seeds.
- Use approximately 28 grams of seed for a standard 10 x 20″ tray.
- Fill the tray with 3–4 cm of quality potting mix or coco coir. Moisten the soil evenly.
- Sprinkle seeds evenly across the surface and mist lightly with water.
- Cover with a tray lid or blackout dome and place in a dark, well-ventilated space for 4–6 days.
- During germination, water 1–2 times daily to keep the medium moist.
- After germination, remove the cover and move to bright indirect light or gentle direct sun.
- Continue watering as needed to maintain consistent moisture.
Harvest (Microgreens): Ready in approximately 18–30 days. Harvest by cutting 1–2 cm above the soil line with clean scissors or a sharp knife.
