Dark Purple Opal Basil, Heirloom Herb Seeds

Dark Purple Opal Basil — The 1950s University of Connecticut Heirloom as Beautiful as It Is Flavorful

Dark Purple Opal Basil is one of the most visually striking herbs you can grow — developed at the University of Connecticut in the 1950s and prized ever since for its deep purple, sometimes mottled leaves that are as ornamental as they are culinary. Grown as much for its dramatic decorative appeal as for its rich basil flavor, Dark Purple Opal is a standout in herb gardens, container plantings, and edible landscapes alike. The deep purple foliage makes a stunning contrast against green herbs and vegetables, and the leaves deliver classic basil flavor with a slightly spicier, more complex edge. Use fresh in salads, as a garnish, in pestos, infused vinegars, and anywhere you want both flavor and visual drama.

Why Grow Dark Purple Opal Basil?

• University of Connecticut heritage — developed in the 1950s, a proven classic
• Deep purple, sometimes mottled leaves — one of the most ornamental herbs available
• Dual ornamental & culinary value — as beautiful in the garden as it is in the kitchen
• Rich basil flavor with complexity — excellent in salads, pestos & infused vinegars
• Stunning contrast plant — dramatic against green herbs and vegetables
• Open-pollinated heirloom — save seed year after year

Growing Notes

Start indoors 4–6 weeks before last frost. Sow seeds ⅛ inch deep in fertile, well-draining soil. Transplant outdoors after all frost danger has passed and nights are consistently above 50°F, spacing plants 12–18 inches apart in full sun. Basil needs warmth — cold temperatures cause blackening of leaves. Pinch off flower buds as they appear to encourage bushy growth and continued leaf production. Harvest regularly for best flavor and productivity.

Packed and shipped by Box Garden Seeds LLC — heirloom seeds grown without GMOs, selected for flavor, resilience, and your garden’s success.