Radishes are easy and quick to grow. Cool weather is essential for best radish quality because they become "hot" and woody in hot weather. Small, round varieties mature more quickly than long types.
Sow seed 1/4 inch deep in rows 12 inches or more apart. Radishes should be thinned to allow 2 to 3 inches between plants. Make several small plantings at seven- to 10-day intervals because radishes are in prime condition for only a few days. Radishes can be grown as a spring, fall or winter crop depending on your planting zone.
Harvest radishes when roots are 1/2 to 1 inch in diameter. Radishes remain in edible condition for only a short time. Wash roots, trim both taproot and tops, and store in plastic bags in the refrigerator. They will keep up to a month.
