70 to 90 Days to maturity. Daucus carota Samurai Red - Carrot Seeds. Heirloom. Cool Season Annual. This is a Japanese kintoki-type (sweet red) carrot. Its glossy deep scarlet roots grow into beautifully tapered carrots 10-12” long and are notably tender, sweet, and juicy. Asian carrots have more anthocyanin than carotene which gives it the deep color and are planted during late summer-early fall for winter harvest. ~ 25,000 seeds / oz.