Dark Opal Basil

Dark Opal basil is a stunning heirloom variety, celebrated for its deep purple leaves and classic basil aroma. This basil adds dramatic colour to garden beds, containers, and culinary dishes, making it a favourite among Canadian gardeners and chefs. The leaves are tender and flavourful, perfect for fresh eating, pesto, salads, and garnishes.

Key Features of Dark Opal Basil Seeds

• Heirloom, open-pollinated, and non-GMO seeds
• Produces glossy, deep purple leaves with occasional green highlights
• Classic sweet basil flavour—ideal for fresh eating, cooking, and garnishing
• Highly ornamental—adds visual interest to gardens and containers
• Attracts bees and other pollinators with its pink-lavender flowers
• Adaptable to a wide range of Canadian climates and soil types
• Reliable performance and high yields
• Suitable for spring and summer sowing

Planting and Growing Dark Opal Basil

• Sow seeds indoors 4–6 weeks before last frost or direct sow outdoors after all danger of frost has passed
• Plant seeds 0.5 cm (¼ inch) deep, spaced 20–30 cm (8–12 inches) apart in rows 45 cm (18 inches) apart
• Choose a sunny location with well-drained, fertile soil
• Water regularly to keep soil evenly moist, especially during dry spells
• Days to germination: 7–14 days; days to maturity: 60–75 days

Care Tips

• Mulch to retain moisture and suppress weeds
• Feed with a balanced organic fertilizer every 4–6 weeks
• Pinch back growing tips to encourage bushy growth and prevent early flowering
• Harvest leaves regularly for best flavour and continuous growth

Harvesting & Storing

• Harvest leaves as needed once plants are well established
• Use fresh in salads, pesto, and as a garnish; leaves can also be dried for later use
• Store harvested leaves in a cool, dry place or freeze for long-term storage

Frequently Asked Questions

• Does Dark Opal basil need full sun? Yes—at least 6 hours daily for best growth and colour.
• When should I plant Dark Opal basil seeds? Sow indoors before last frost or direct sow outdoors in late spring.
• Can I grow Dark Opal basil in containers? Yes—choose a sunny spot and use rich, well-drained soil.