What is a Watermelon radish?

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What is a Watermelon radish? Which parts of a Watermelon radish are edibles?

Watermelon radish is cultivar of Daikon also known as Chinese radish the outer color of the radish is white or green the inner part is red-pink, the radish remind watermelon colors but much smaller.

Edible part in Watermelon radish is entire plant: root, leaves, sprout, pods and seeds.

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