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Watermelon Radish (Raphanus sativus) is an heirloom Daikon radish from China with a white exterior. When sliced, this radish looks like a small slice of watermelon, with a green and white edge surrounding a rosy center. Standard seed packet contains 3 g (about 280 seeds). Jumbo packet contains 10 g (about 950 seeds).
The spicy flavor of radishes adds a welcome kick to salads and salsas. Sautéed or roasted, the radish flavor is significantly more mellow. With as few as 25 days from sowing to harvest, this vegetable is a great choice for children to plant and grow. Large, premium seed packets give instructions on how to grow and when to plant outdoors.
Sow outdoors in a sunny spot with loose, well-drained soil. Water continuously and evenly. Best planted in late summer or fall; will bolt in hot weather. Harvest at 3" or smaller; watermelon radish becomes woodier at larger sizes.
Days to germination: 5-7
Planting depth: 1/4"
Plant Spacing: 1-3"
Soil Temperature: 55-75°F
Light Requirements: Full Sun