Basil ‘Dark Opal’
Ocimum basilicum
Description
The darkest foliage variety of basil we’ve ever grown, ‘Dark Opal’ is almost black and looks stunning mixed with vibrant colors. With a warm, clove-like scent and a mild, earthy flavor, this heat-loving foliage is a wonderful addition to summer bouquets.
Details
Height: 16 to 18 in
Site: full sun
Days to maturity: 65 to 75 days
Plant spacing: 9 in
Pinch: when 8 in tall
Seed Sowing & Growing Notes
Start seed indoors in trays 6 weeks before last frost; transplant out after all danger of frost has passed. Basil is very sensitive to cold; wait until the weather has warmed to transplant out.
Harvesting/Vase Life
Details
Description
The darkest foliage variety of basil we’ve ever grown, ‘Dark Opal’ is almost black and looks stunning mixed with vibrant colors. With a warm, clove-like scent and a mild, earthy flavor, this heat-loving foliage is a wonderful addition to summer bouquets.
Details
Height: 16 to 18 in
Site: full sun
Days to maturity: 65 to 75 days
Plant spacing: 9 in
Pinch: when 8 in tall
Seed Sowing & Growing Notes
Start seed indoors in trays 6 weeks before last frost; transplant out after all danger of frost has passed. Basil is very sensitive to cold; wait until the weather has warmed to transplant out.
Harvesting/Vase Life
Sources
How to Grow
How to Grow

Summer Mini Course
Learn how to grow, harvest & arrange beautiful cut flowers
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