Like many vegetables, there are innumerable varieties of radishes at your disposal, both hybrid and open-pollinated. If you are a novice gardener, consider growing Cherry Belle radishes; they mature in just 22 days and have a pleasant, mild flavor.  Spring radishes are the types that people are most familiar (like the Cherry Belle radish, which is red on the outside and white on the inside). You want to make sure that you're growing these in spring or fall. They tend to be the fastest growing radish, as well. Typically the summer radish is similar to the spring radish but tends to grow more slowly, taking around 6-8 weeks to mature. The winter radish is much larger and starchier than the spring and summer radishes and takes longer to grow. It's best to sow it in late summer for a fall or winter harvest. Winter radishes include Daikon and Champions. Daikon can grow to 18 inches (45 cm) long and takes 60 days to mature, and includes some extra-spicy varieties. Radishes should be planted in an area with full sun or partial shade, and loose, well-drained soil. Remove any rocks from the soil, as the roots will bifurcate around any rocks in their way. Add organic matter to the soil before planting, such as compost, manure, or leaf mold.  Make sure your radishes are getting plenty of sunlight. Otherwise, they will grow big on top and very small in the root section. However, too much sunlight can cause radishes to go to seed. The soil needs to be free of rocks, well-drained and have a pH content of around 7.4. This high pH content helps prevent club root, a brassica-infecting fungus that causes plant roots to swell, misshape, crack, rot and sometimes lead to plant death. To raise the pH, add dolomite lime or agricultural lime in autumn. Use plenty of organic matter (like compost) in the soil. For best results, conduct a soil test or send soil samples to a lab to check for proper nutrients. Make any adjustments to the soil at least one week before planting. Radishes are a cool weather crop best planted in spring and...

TL;DR in Chinese:
决定你想要种植的萝卜品种。 挑选合适的种植位置。 安排你的萝卜种植计划。