Alphabetical Plant Listing

Ocimum basilicum 'Siam Queen' (Thai Basil)

Thai Basil 'Siam Queen', Siam Queen Basil


An improved Thai basil or tropical basil, Ocimum basilicum 'Siam Queen' is a vigorous annual herb boasting highly aromatic, glossy green leaves rich of a licorice basil aroma. As an added bonus, it is late to produce flowers, which often make basil develop a bitter taste. In many Thai dishes, Thai basil is added last, just prior to serving for its fragrance and flavor. While most basils are grown just for their leaves and flavor, Siam Queen Basil is prized for both its culinary use and ornamental qualities: green foliage and attractive lavender flowers. Remember it is of tropical origin, so provide warm soil and air temperatures for rapid vigorous growth.

  • All-America Selections winner (1997).
  • Grows up to 20-24 in. tall and wide (50-60 cm).
  • Performs best in fertile, well-drained soils in full sun. Water freely in summer. Provide a sheltered site. Basil is extremely frost sensitive.
  • Harvest mature leaves for fresh use at any time. To dry the leaves, hang out of direct light, then store in an airtight container in a cool place.
  • Keep an eye out for leafhoppers, aphids, slugs, snails and powdery mildews. Deer and rabbit resistant.
  • Pinch out flower heads to promote bushy plant growth and to extend the plant’s productive life.

Not sure which Ocimum - Basils to pick?
Compare All Ocimum - Basils

Buy Ocimum basilicum 'Siam Queen' (Thai Basil)

Requirements

Hardiness 2 – 11
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, A1, A2, A3
Plant Type Annuals, Herbs
Plant Family Ocimum - Basils
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early,Mid,Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Plant of Merit
Tolerance Deer, Rabbit
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Informal and Cottage

Buy Plants

Great Plant Combination Ideas with Ocimum - Basils

Guides with Ocimum - Basils


Shutterstock

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 2 – 11
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, A1, A2, A3
Plant Type Annuals, Herbs
Plant Family Ocimum - Basils
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early,Mid,Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 24" (60cm)
Water Needs Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Plant of Merit
Tolerance Deer, Rabbit
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Informal and Cottage

Great Plant Combination Ideas with Ocimum - Basils

Guides with Ocimum - Basils

Plant Calculator

How many Ocimum basilicum 'Siam Queen' (Thai Basil) do I need for my garden?

%
ft
ft

Your Shopping List

Plant Quantity
Ocimum basilicum 'Siam Queen' (Thai Basil)

Find your Hardiness Zone

Find your Climate Zone

Find your Heat Zone

Join Gardenia.net

Create a membership account to save your garden designs and to view them on any device.

Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

Join now and start creating your dream garden!

Create a New Collection

Optional. For your reference.


Move Selected Plants to a Different Collection


Delete Collection

This field is required.