70 Days to maturity. Raphanus sativus. Shogoin Globe Radish Seeds. Cool Season Annual, Heirloom. Shogoin Globe radishes are round daikon radishes that grow quite large–up to 7 inches in diameter! This variety’s roots do most of their growing aboveground, making them a great choice for clay or compacted soils. They have firm, crunchy white flesh and pale green shoulders ideal for pickling or cooking. Children might enjoy watching Shogoin Globe radishes grow above the soil! Plant in late summer or early fall for a winter harvest. ~ 3,800 seeds / oz.