Giant Sakurajima Radish Seeds – World's Largest Radish, Up to 100 lbs, Mild & Sweet, Japanese Heirloom, 80–90 Days

Sakurajima Mammoth Radish – World’s Largest Radish (Raphanus sativus)

The Sakurajima Mammoth Radish is an extraordinary Japanese heirloom — grown in the volcanic soil of the Sakurajima region at the southern tip of Japan, it is renowned worldwide as the largest radish on Earth, capable of growing to an astonishing 100 pounds or more. But this isn’t just a novelty plant: beneath the giant, round, white exterior lies a core that is consistently crisp, juicy, and mild with a pleasantly sweet flavor. Prized in Japan for both pickling and cooking, where its size, mild heat, and texture make it ideal for large-batch preparations.

A cool-season giant that rewards patient gardeners with one of the most impressive harvests in the vegetable world. A true garden centerpiece.

Seed Details

• Variety: Sakurajima Mammoth — Japanese heirloom giant white radish
• Origin: Sakurajima region, Kagoshima Prefecture, Japan
• Root: Large, round, white; can exceed 100 lbs; typically harvested at ~10" diameter
• Flesh: Crisp, juicy, mild and sweet — inner core remains fresh even as outer matures
• Days to Maturity: 80–90 days
• Season: Cool-season annual; sow in late summer
• Seeds/lb: ~26,000
• Best Use: Pickling, soups, stews, braised dishes, grated daikon-style

Growing Instructions

• Sow seeds in late summer in fertile, deeply prepared, well-drained soil in a warm, sunny location. Deep soil preparation is critical for large root development.
• Sow ½" deep; thin to allow ample space for root expansion.
• Keep soil consistently moist and fertilize regularly throughout the growing season.
• Harvest when roots reach approximately 10" in diameter for best quality. Use promptly after harvest.

Culinary Uses

• Pickle in salt, miso, or rice bran (nukazuke) for traditional Japanese preserved radish
• Slice or cube for soups, stews, and braised dishes
• Grate fresh for a daikon-style condiment alongside grilled fish or meat

Select your desired seed quantity above. Cool-season annual; sow late summer for fall harvest.