The researchers studied how different planting dates affect the growth, yield, and water use of spring maize. They planted two maize genotypes on April 24 and May 15 and found that planting on May 15 resulted in higher leaf area, dry matter, and grain yield. The 1,000-grain weight did not differ significantly between genotypes or planting dates, but the grain number was higher for the second planting date. Water consumption and efficiency were also better for the later planting date. Overall, planting maize later in the season led to better growth and yield due to increased leaf area and dry matter accumulation.