BASIL ‘Siam Queen’ Herb Seeds
Botanical Name: Ocimum basilicum var. thyrsiflora
Siam Queen Basil is a striking and aromatic variety celebrated for its authentic Thai flavour and vigorous growth. It features large, lush leaves with a rich sweet-anise fragrance and hints of clove, mint, and spice—perfect for curries, stir-fries, and fresh garnishes. The glossy green foliage and striking purple stems make this basil equally at home in ornamental beds and culinary gardens.
Plant Information
- Plant Type: Warm season annual, frost tender
- Plant Height: Up to 60 cm
- Sow When: Seeds germinate best at 20–30°C soil temperature
- Temperate: Spring to early summer outdoors; year-round indoors in bright, warm spots
- Cool: Late spring to early summer; start indoors from late winter for earlier harvests
- Subtropical: Spring to early summer outdoors; year-round in protected areas or pots
- Tropical: Autumn to early spring outdoors; avoid peak wet season; year-round in containers
- Arid: Early spring and late summer; sow during milder conditions and shelter young plants from extreme heat
Germination Information
- Germination: 7–14 days
- Depth: Surface sow; press seeds gently into soil without heavy covering
- Position: Full sun for best flavour and growth; partial shade tolerated in very hot areas
- Sow Where: Direct sow in prepared garden beds or containers, or start in trays and transplant once seedlings have 4–6 true leaves
- Soil Type: Well-drained, fertile soil enriched with compost; pH 6.0–7.5
- Spacing: 30–45 cm between plants for optimal airflow and growth
Growing Tips
- Keep soil consistently moist but never waterlogged.
- Mulch around plants to conserve moisture and deter weeds.
- Pinch flower buds regularly to extend the harvest and encourage bushy growth.
- Harvest frequently to maintain tender leaves and strong flavour.
- In cool climates, grow in pots that can be moved indoors to protect from frost.
- Feed every 3–4 weeks with liquid organic fertiliser to support lush, healthy plants.
- For best flavour, add Siam Queen Basil at the end of cooking.
Harvest (Leaves)
Begin harvesting leaves approximately 80 days after sowing. Regular picking of young shoots and leaves will keep plants productive and tasting their best.
How to Grow Siam Queen Basil as Microgreens
Growing Siam Queen Basil as microgreens provides a concentrated burst of sweet anise-clove flavour and beautiful colour.
- 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 evenly before sowing.
- Scatter seeds evenly and mist lightly.
- Cover with a tray lid or blackout dome and place in a dark, ventilated space for 4–6 days.
- Water 1–2 times daily to keep the growing medium moist.
- After germination, uncover and move to bright indirect light or gentle morning sun.
- Continue watering regularly to maintain consistent moisture.
Harvest (Microgreens): Ready in approximately 18–30 days. Cut microgreens 1–2 cm above the soil line with clean scissors or a sharp knife.
