Basil – Purple Dark Opal

Basilius Magnus

• Growing Temp 60°F – 85°F

• Days to Maturity 60-90 days

Ease of Cultivation and Vibrant Color: Purple Dark Opal basil is an attractive variety known for its stunning deep purple leaves and aromatic flavor. This herb is relatively easy to grow, making it an excellent choice for home gardens and ornamental plantings. Its striking color enhances various dishes, including salads, pasta, and pesto, adding both visual appeal and unique flavor.

Direct Sowing: For direct sowing, plant Purple Dark Opal basil seeds outdoors after the last expected frost when the soil temperature is consistently above 60°F. Sow the seeds about ¼ inch deep and spaced 12 inches apart in rows that are 18–24 inches apart. Germination typically occurs within 7–14 days. Keeping the soil consistently moist during this period is essential for strong growth. Once seedlings are established, thin them to provide adequate airflow and prevent overcrowding. You can begin harvesting leaves when they are approximately 3–4 inches long, ensuring to take no more than one-third of the plant at a time.

Early Sowing for Seedlings: To start early, sow Purple Dark Opal basil seeds indoors 6–8 weeks before the last expected frost. Use seedling trays filled with quality potting mix, placing 2-3 seeds per cell. Maintain a temperature of 70–80°F to encourage germination. Once the seedlings develop their first true leaves and the danger of frost has passed, transplant them into the garden. Space the transplants about 12 inches apart in rows that are 18–24 inches apart. Water them thoroughly after planting and consider adding mulch around the base to help retain moisture and suppress weeds.

Harvesting: To determine when Purple Dark Opal basil is ready for harvest, look for vibrant purple leaves that are lush and aromatic. You can start harvesting once the plants have sufficient foliage, typically within 60-90 days after sowing. It’s best to pick the outer leaves first to encourage bushier growth. Regular harvesting promotes continued production and helps prevent flowering, which can affect the flavor of the leaves. For the best taste, harvest in the morning when the essential oils are most concentrated.