Once these seeds germinate, keep them growing by providing lots of water. If they stop growing, they will be stunted and woody. Soil should be free of rocks and relatively light.
Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that California Mammoth White Winter is thought of as half hardy, so protect with a row cover whenever the temperatures drop. California Mammoth White Winter needs a loamy, clay and sandy soil with a ph of 5.5 to 6.8 (weakly acidic soil).By our calculations, you should look at sowing California Mammoth White Winter about 28 days before your last frost date.
This radish is large, white, and produces better in fall & winter than in spring.