• A Siam Queen Basil plant with striking purple stems and veins, showcasing lush leaves and blooms. | copyright: Floramedia UK Ltd
    © 2026 Floramedia UK Ltd
  • A close-up view of Siam Queen basil leaves, covered in purple blooms, against a blurred background. | copyright: Floramedia UK Ltd
    © 2026 Floramedia UK Ltd
  • An overhead view of a vibrant Siam Queen basil plant with bright purple leaves.
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Basil Seeds - Siam Queen

Pungent leaves offer a spicy bite of licorice

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About the Variety

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Key Features

Heat Tolerant
Prefers Moist Soil
Hydroponic Friendly
Container Friendly
Fragrant
Fast Growing
Easy to Grow
Medicinal
Deer Resistant
Rabbit Resistant
Deters Insects
Microgreens
Edible

Plant Details

BOTANICAL NAME

Ocimum basilicum

LIFE CYCLE

  • Annual

LIGHT REQUIREMENT

  • Full Sun

DAYS TO MATURITY

  • 60 to 90 days

GROWTH HABIT

  • Upright

COLOR

  • Green
  • Purple

Grow Heirloom Basil - Plant Thai Siam Queen Basil Seeds

Large, lush green leaves contrast with square, purple stems and deep purple flowers. Grow Thai Siam Queen for its spicy aroma that is a cross between cinnamon and anise. Late flowering, resulting in high herb yields.

  • • Heirloom Seed; Popularly used in Asian cuisine
  • • Tall, easy and fast-growing annual
  • • Thrives in bright, sunny growing areas

Planting Information

PLANTING SEASON

  • Spring

SOWING METHOD

  • Direct Sow
  • Start Indoors

PLANTING DEPTH

  • 1/4 inch

WATER NEEDS

  • Average

PLANT SPACING

  • 10 inches

HARDINESS ZONES

  • N/A - Annual

SEED PREP

  • Requires Light

COVERAGE

Amount Avg Seed Count Recommended Coverage
Packet 353 Up to 30 Sq. Ft
1 Ounce 20,735 Up to 150 Sq. Ft

Planting Guide

View our Basil Planting Guide to learn more.

Ready to Grow

We guarantee that our seeds & bulbs will be true to type and ready to thrive. If something doesn't grow as expected, we will make it right. Questions? Call us at 855-440-2929

Basil Seeds - Siam Queen

$5.49

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Basil Seeds - Siam Queen FAQs

Is Siam Queen Basil resistant to animals or disease?

Siam Queen Basil is deer resistant, meaning deer generally avoid it due to its taste, texture, or aroma.

What type of seed is Siam Queen Basil?

Siam Queen Basil is classified as heirloom seed and open pollinated seed.

What is the flavor profile of Siam Queen Basil?

Siam Queen Basil has a flavor profile described as spicy, sweet, and notes of anise.

Grown by Our Community • All basil