Alphabetical Plant Listing

Ocimum basilicum 'Dark Opal' (Sweet Basil)

Sweet Basil 'Dark Opal', Dark Opal Basil, Ocimum basilicum 'Purpurascens'


Noted for its striking foliage and delicate licorice scent, Ocimum basilicum 'Dark Opal' (Sweet Basil) is an annual or biennial herb with stunning deep purple almost black leaves. In summer, attractive spikes of small, tubular cerise flowers arranged in whorls are borne above the foliage. While most basils are grown just for their leaves and flavor, Dark Opal Basil is also very ornamental in the garden. A popular herb for growing at home, both in gardens and containers, it can be used for tomato sauce, spaghetti, stews, fish, vinegars and salads.

  • All-America Selections winner (1962).
  • Grows up to 18-24 in. tall (45-60 cm) and 24 in. wide (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.

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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 18" – 24" (45cm – 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

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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 18" – 24" (45cm – 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

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