Mizuna

Brassica rapa var. japonica
Mild and sweet enough for salads, the thin, light-green, feathery leaves are deeply-cut but not curled. Plants grow vigorously so thin to at least 20cm (8"). Cut the whole plant about an inch above the ground and it will re-grow or pick individual leaves. Mizuna can be cut and picked many times. Plant in late summer and cover with cloche - it will grow even under low light conditions. Note that it will bolt in April if overwintered.
Matures in 45 days. (open pollinated seeds)