Radishes prefer cool soil, so start your container garden early in spring.
Don’t sow the seeds of this radish until late summer, or it may bolt and get tough. White Chinese Celestial. This mild winter radish takes about 60 days to mature. The size is about six or eight inches long and up to three inches across.
Prepare garden soil or a planting bed by tilling the soil at least 8 to 20 inches deep, depending on the variety you are growing. For a container garden, plant radishes in well-drained pots that are at least 8 inches deep for globe radishes, and 10 to 24 inches deep for cylindrical varieties.