Sowing: Since Black Spanish are winter radishes, they should be planted about two months before the first expected fall frost. Plant Black Spanish round radish seeds in very rich, deeply worked up soil about 1/2" deep and 1" apart; later, thin the seedlings 4-6" apart. Black Spanish radishes do not tolerate heat well.
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Growing: Radishes do well with consistently moist soil and the addition of organic matter such as compost. Do not allow the soil to dry out, but also avoid overwatering as this can cause splitting.
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Harvesting: Black Spanish radishes have the best taste when harvested at 3-4" in diameter. They have a strong, hot flavor and store well for winter use.
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