Mountain Valley Seed Company Seeds: Arugula Microgreens - 1 Lb Seed - Grow Micro Greens Eruca sativa  43 days. An easily grown green that adds a tangy, peppery flavor to salads. Plant in the spring and again in the fall. Use only young leaves when about 2 to 3 inches long.  Approx. 14,000 seeds/oz. 