30 to 45 days — 'Mizuna' is a cold-hardy Japanese variety that produces plants comprised of thin, frilly-edged leaves. Synonyms include 'Shui Cai', 'Kyona', 'Japanese Mustard', 'Potherb mustard', 'Japanese greens', 'California peppergrass', and 'Spider mustard.'
Plant growth is vigorous and swift, which allows for multiple harvests. Its flavor is notably mild for mustard greens and slightly peppery tasting. The leaves are often used in salad mixes, as "baby greens," or lightly braised. Each packet contains one gram, which is approximately 350 seeds.