Planting date affects the growth and yield of forage maize. Delaying planting date leads to delayed growth stages and shorter duration of certain stages. Maize plants are taller when planted later, with the tallest plants at different stages depending on planting date. The number of leaves per plant decreases during tasseling but increases later on. Overall, delaying planting date reduces fresh matter, forage, and grain yield. The study helps guide optimal planting dates for high-yield forage maize cultivation.