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2025 Seed Catalog

Siam Queen Thai basil

HR00023

Siam Queen

Thai Basil Seeds

Both an outstanding ornamental and top-quality culinary basil. Leaves green, stems purple, flowers pink-violet. This is the basil most often used in Vietnamese and Thai cooking. With mild overtones of anise, 'Siam Queen' adds the right touch of spice to soups, curries and beef dishes. Grows to 2 ft. tall. Packet is ¼ gram, about 175 seeds.

¼ gram - $3.49
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View all of our Basil varieties.

Growing Siam Queen Basil Seeds

Bee introduces how to plant

Plant Basil Seeds: Direct sow into the garden after all danger of frost. Plant seed ¼ in. deep, 2-3 seeds per inch, in rows 18 in. apart. Firm the soil well over the seeds. Thinning is not necessary. Can be started indoors in cell packs or flats 6 weeks prior to setting out. Kept at 70°F., germination is in 5-10 days.

Grow Basil: Basil prefers warm weather and is very sensitive to cold. Removing flowers and pinching taller stems will result in bushier plants that produce more leaves and better flavor. Removing leaves from basil plants helps promote growth. Some basils may die back after blooming. Basil is often companion planted with tomatoes.

Shipping Information

U.S. Shipping Rates

Free shipping on U.S. orders over $60.00.
Free priority shipping on U.S. orders over $150.00.

Standard U.S. shipping is $5.99.
Priority U.S. shipping is $9.99.


International Shipping Rates

Shipping to Canada is $13.99.
International shipping to all other countries is $15.99.

Satisfaction Guarantee

We guarantee all the seeds we sell for one full year from the date of purchase. If you are unsatisfied with any seeds purchased from Swallowtail Garden Seeds, we will issue a refund. For customers in the U.S., we can send one-time replacements or issue a refund.