As the 2025 growing season progresses, Richland Parish producers are closely monitoring the development stages of their crops, with corn continuing to dominate local acreage and expected to be the first harvested.
LSU AgCenter Corn Specialist Dr. Shelly Kerns said most corn crops in the state have progressed into reproductive growth phases.
Corn crops in Richland Parish have now reached the Dough Stage (R4), with some fields advancing into the Dent Stage (R5). These stages are critical in determining both the yield potential and proper timing for irrigation and harvest preparation.
The Dent Stage typically occurs 31 to 33 days after silking. At this point, kernels begin to form a dent at the top, with a distinct milk line separating the liquid and solid contents. Kernels at the beginning of the Dent Stage contain approximately 60% moisture. Growers can often breathe easier as the plant will soon be on its way to Physiological Maturity. Agronomists stress the importance of continued irrigation during this phase to support final stages of kernel development.
Looking ahead, the final stage of corn development— known as the Physiological Maturity Stage (R6), or Black Layer—occurs approximately 35 to 39 days after silking. By this stage, the milk line has disappeared, and starch accumulation has reached the base of the kernel. A black layer forms at the kernel base.
This prevents more moisture from entering the kernels.
Once the corn reaches 30% moisture content it has reached maturity. This visible indicator confirms that the crop has reached full physiological development, and from this point forward, only external stressors like weather or disease can impact yield. Once kernel moisture drops to 15%, corn is considered ready for harvest.
The LSU AgCenter will continue to provide timely updates as crops progress through the final stages of development. Producers are encouraged to remain vigilant in crop management to ensure optimal harvest outcomes.
