Botanical Name: Brassica oleracea subsp. chinensis
Days to Maturity: 35–60 Days
Hardiness: Frost-tolerant biennial usually grown as an annual
Plant Dimensions: Up to 20" tall, 12" wide
Variety Information: Smooth, dark green leafy blades in a cluster, with white, crisp stems.
When to Sow Outside: RECOMMENDED. 2 to 4 weeks before your average last frost date, when soil temperature is at least 60°F; ideally 75°–85°F. Sow again in late summer for fall crop. In mild climates, sow in the fall for winter or spring harvest.
When to Start Inside: Not recommended due to quick maturity.
Days to Emerge: 5–10 Days
Seed Depth: ¼"
Seed Spacing: A group of 3 seeds every 6"
Row Spacing: 12"
Thinning: When 2" tall, thin to 1 every 6"
Harvesting: Harvest in the morning, if possible. Harvest individual, outer leaves as the plant grows and/or cut the entire plant at the base when it reaches the desired size. Dunk the harvest in cold water and drain before storing.