Regularly monitor the crop for signs of nutrient deficiencies, such as yellowing leaves or stunted growth. These can indicate a need for foliar feeding or adjustments to your fertilization program. Soil testing is recommended to optimize nutrient use and improve overall crop performance. Harvesting: DK7500 is typically ready for harvest 90 to 100 days after planting. The crop should be harvested when the kernels are firm and the cobs are well-formed. Harvesting should be done when the maize has reached physiological maturity. To prevent spoilage or post-harvest losses, harvest during dry weather.