Radish Red Arrow Daikon (Net Wt. 1.5 g.) – Matures in 40 days. The 'daikon' is a Japanese winter radish which literally translates to 'great root'. A smooth pink skinned root with a bright white core that unlike fiery radishes, is mildly spicy. Red Arrow was re-selected for the bright pink stem it produces when grown as micro-greens.