Thai Basil (Ocimum basilicum var. thyrsiflora) Seeds

Thai Basil (Ocimum basilicum var. thyrsiflora) is an aromatic, upright basil variety with striking purple stems, glossy green leaves, and showy clusters of lavender-pink flowers. This vigorous annual herb thrives in warm climates and grows beautifully in sunny borders, raised beds, patio containers, and herb garden displays. Its blooms attract bees and other pollinators, adding ornamental and ecological value to summer plantings.

Features

• Upright basil variety with purple stems and flower spikes
• Non-GMO Ocimum basilicum var. thyrsiflora
• Excellent for containers, borders, and raised beds
• Aromatic foliage for sensory and ornamental gardens
• Attractive flowers draw bees and other pollinators
• Vigorous warm-season growth in full sun

Specifications

• Common Name: Thai Basil
• Scientific Name: Ocimum basilicum var. thyrsiflora
• Plant Type: Annual
• USDA Zones: 4–11 (grown as a warm-season annual)
• Season: Late spring through summer
• Height: 14–30 inches
• Foliage: Bright green aromatic leaves with purple stems
• Bloom Color: Lavender-pink flower clusters
• Heirloom: Yes
• GMO Status: Non-GMO
• Organic: Not certified organic
• Light Requirements: Full sun
• Soil Preference: Well-drained, nutrient-rich garden soil
• Water Needs: Moderate
• Growth Rate: Fast
• Days to Maturity: 60–75 days
• Heat Tolerance: Excellent
• Cold Tolerance: Poor; frost sensitive
• Plant Spacing: 10–14 inches
• Seed Longevity: 3–5 years stored cool and dry

Planting Guide 

• Sowing Method: Start indoors or direct sow after frost danger passes.
• Seed Preparation: No soaking or stratification required.
• When to Plant:
• Indoors: 4–6 weeks before last frost
• Outdoors: After frost when soil has warmed
• Sowing Depth: Press into soil and cover lightly (1/8 inch).
• Germination Time: 7–14 days in warm soil.
• Light Requirements: Full sun for upright, vigorous growth.
• Soil Conditions: Loose, fertile, well-draining soil.
• Watering: Keep moist during germination; moderate watering later.
• Maintenance:
• Pinch growing tips to encourage bushier plants
• Remove early flower spikes for extended leaf growth
• Do not overwater, especially in containers