Tatsoi Mustard Brassica narinosa 'Tatsoi' Duration: Annual When to Sow: Spring/Late Summer/Early Fall Ease of Germination: Easy (Spoon mustard) Oriental green with a soft creamy texture and distinctive subtle flavour. When seeded thickly the small dark green baby greens are ready to harvest in 21 days after sowing. When seeded less thickly the leaves form a compact, thick rosette in 45 days, perfect for bunching. Very cold tolerant: can be harvested even from under the snow. https://www.richters.com/Web_store/web_store.cgi?product=X8517&show=&prodclass=Vegetable_Seeds&cart_id=2577263.6554