Siam Queen Thai Basil brings the authentic flavors of Southeast Asia to your garden with its bold licorice-anise taste and striking purple stems. This heirloom variety produces large 4-inch rich green leaves that give off an intoxicating clove scent, making it essential for Thai curries, stir-fries, and soups. Growing 20-24 inches tall as compact bushes, it thrives in zones 4-11 and reaches harvest in 60-75 days. The spectacular purple flower heads not only add ornamental beauty but also attract beneficial pollinators to your garden.
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What makes Siam Queen truly special is its dual nature as both a culinary powerhouse and garden showstopper. The large leaves deliver an authentic Thai flavor profile with bold licorice-anise notes and spicy clove undertones that can't be replicated by sweet basil. Purple stems create stunning contrast against the rich green foliage, while the impressive flower heads develop progressively and serve as natural insect repellents. This improved variety has been selected specifically for producing very large and lovely flower heads, making it equally valuable in ornamental gardens and herb beds.
Siam Queen excels in Thai cuisine where its bold licorice-anise flavor and spicy clove notes are irreplaceable in curries, stir-fries, and soups. The large 4-inch leaves can be used fresh in zesty salads or cooked to release their strong anise flavor. Traditional medicinal applications include using the leaves to aid skin wounds or insect bites. The aromatic purple flowers serve as natural insect repellents against flies and mosquitoes while attracting beneficial pollinators like bees and butterflies.
No timeline data available yet for this variety.
Start seeds indoors 4-6 weeks before the last frost date. Sow seeds 1/4 inch deep in seed-starting trays, maintaining soil temperature between 70-85°F for optimal germination, which typically occurs in 6-10 days. Harden off seedlings over 7-10 days before transplanting to prevent shock.
Transplant seedlings outdoors when nighttime temperatures consistently stay above 50°F and all danger of frost has passed. Space plants 8-12 inches apart to allow for adequate airflow and growth.
In warmer climates, seeds can be directly sown into prepared garden soil once the danger of frost has passed and soil temperature reaches 70-85°F.
Harvest leaves when they reach 4 inches in size and give off a strong clove scent, but before the plant blooms for optimal flavor. Leaves can be harvested continuously for 60-75 days. For seed collection, cut stems when the bottom seed heads start to turn brown and dry away from direct sun in a well-ventilated area.
Regularly pinch off growing tips and flower buds to delay bolting and extend the harvest window for flavorful leaves. This frequent pruning encourages bushier growth and prevents the plant from going to seed too early. If you want to collect seeds, allow flower heads to mature progressively from bottom to top later in the season.
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“Siam Queen Thai Basil originated from Southeast Asia, where it has long been cultivated as a genuine Thai basil variety essential to the region's cuisine. This heirloom has been preserved and passed down through generations of gardeners who recognized its superior flavor profile and ornamental qualities. As an improved variety, Siam Queen was specifically selected for its ability to produce very large and lovely flower heads while maintaining the authentic taste profile that makes Thai basil irreplaceable in Southeast Asian cooking.”