Description Look for lush, dark green leaves with contrasting purple stems on this A.A.S. winner. Siam Queen (Thai) Basil seeds grow into a plant that has a wonderful licorice aroma. Popular in Thai (Horapha) and Vietnamese (Hung Que) cuisine. Annual. How to Grow Do not rush planting. As Basil loves warm soil and warm temperatures, it will languish if temperatures are below 15°C (60°F). Sow seed directly outdoors in a sunny site with average soil in late May and June. Plant seed 4 mm (3/16″) deep and 6 mm (1/4″) apart. Thin to 20-25 cm (8-10″) apart in the garden. Seed can also be started indoors in a soil-less mix 4-6 weeks before last frost date. Keep temperature at 21°C (70°F) for the 7-10 day germination period, then grow on at the same temperature before hardening off and transplanting outside after the danger of all frost has passed.
