300 Mustard Seeds - Osaka Purple. NON-GMO. From USA. Recently germination tested. Minimum 80% germination guarantee. 21 to 45 days. An outstanding mustard of dark green-purple leaves with bright white veins. Harvest at 4 to 6 inches for salad or allow it to grow to full size for boiling greens. Fast and easy to grow, great crop for spring, or fall into early winter. Colorful microgreen with a bit of a bite.Osaka mustard is a strong japanese mustard, with beautiful purple highlights. Days to Maturity:30-45 Hardiness Zone:3-7 Temp Preference:Cooler Track Page Views WithAuctiva's Counter