Botanical Name: Diplotaxis tenuifolia
Days to Maturity: 40–50 days
Native: Asia and Europe
Hardiness: Frost-tolerant perennial in USDA zones 6–10
Plant Dimensions: 8"–10" tall at maturity
Variety Information: 2"–6" soft, green leaves. Wild arugula has more deeply-lobed leaves than common arugula. Edible flowers are yellow.
Attributes: Good for Containers
When to Sow Outside: RECOMMENDED. 2 to 4 weeks before your average last frost date, when soil temperature is at least 40°F; ideally 50°–70°F. Successive Sowings: Every 3 weeks until 4 to 6 weeks before your average first fall frost date. Mild Climates: Sow in fall for winter harvest.
When to Start Inside: Not recommended.
Days to Emerge: 10–15 days
Seed Depth: ¼
Seed Spacing: A group of 3 seeds every 6"
Row Spacing: 6"
Thinning: When ½" tall, thin to 1 every 6"
Harvesting: For the mildest, best-tasting baby greens, pick leaves when 2"-4" long. Pick individually or cut off the plant at ground level. For the best flavor, harvest before plant begins to flower, unless you plan to eat the flowers.