Italian Large Leaf Basil (Ocimum basilicum) Seeds

Italian Large Leaf Basil (Ocimum basilicum) is a classic heirloom basil variety known for its lush, vigorous growth and oversized aromatic foliage. This non-GMO annual thrives in warm, sunny gardens and is ideal for raised beds, patio planters, cottage gardens, borders, and sensory herb plantings. With its pollinator-attracting blooms and strong summer performance, this basil is a versatile choice for gardeners seeking both ornamental and practical garden value.

Features

• Large aromatic leaves on a vigorous heirloom plant
• Non-GMO Ocimum basilicum variety
• Excellent for warm-season beds, borders, and containers
• Easily shaped by light pruning for full, leafy growth
• White flowers attract bees and garden pollinators
• Productive and fast-growing throughout summer

Specifications

• Common Name: Italian Large Leaf Basil
• Scientific Name: Ocimum basilicum
• Plant Type: Annual
• USDA Zones: 4–11 (grown as a warm-season annual)
• Season: Late spring through summer
• Height: 18–30 inches
• Foliage: Large, aromatic green leaves
• Bloom Color: White if allowed to flower
• Heirloom: Yes
• GMO Status: Non-GMO
• Organic: Not certified organic
• Light Requirements: Full sun
• Soil Preference: Rich, well-drained garden soil
• Water Needs: Moderate, consistent moisture
• Growth Rate: Fast
• Days to Maturity: 60–75 days
• Heat Tolerance: High once established
• Cold Tolerance: Low; frost sensitive
• Plant Spacing: 12–14 inches
• Seed Longevity: 3–5 years when stored cool and dry

Planting Guide 

• Sowing Method: Start indoors or direct sow outdoors after frost.
• Seed Preparation: No soaking or stratification needed.
• When to Plant:
• Indoors: 4–6 weeks before last frost
• Outdoors: After soil warms and frost risk is gone
• Sowing Depth: Press lightly into soil and cover 1/8 inch deep.
• Germination Time: 5–10 days in warm temperatures.
• Light Requirements: Full sun for broad, vigorous growth.
• Soil Conditions: Use loose, well-draining soil with organic matter.
• Watering: Keep moist during germination; water moderately after.
• Maintenance:
• Pinch new tips for bushier growth
• Remove early flowers to maximize leafy production
• Avoid overwatering, especially in containers