To go from a seed to a flower, the seed has to go through the germination process. Germination is usually the growth of a plant contained within a seed; it results in the formation of the seedling.
Seed germination depends on both internal and external conditions. The most important external factors include right temperature, water, oxygen or air and sometimes light or darkness. Click here for more information about germination.
Click here for the more detailed step-by-step guide.