The complex preparation "Emistim C+Mg" is a plant growth regulator containing the plant growth regulator Emistim C. v.s.r., heptahydrate magnesium sulfate, and carbamide. The preparation is used to increase the yield of cereal crops and corn, ensuring optimal plant development at all stages of vegetation. The recommended dosage of the preparation is 1.0 – 1.5 L/ha for cereal crops and 1.0 – 2.0 L/ha for corn during the vegetation period. The preparation can also be used for seed treatment of corn at a dosage of 1.0 – 1.5 L/ton, which improves seed germination and plant health in early development stages. The complex composition of the preparation promotes accelerated growth processes and increased fruiting, which in turn leads to increased overall yield. The preparation "Emistim C+Mg" is a safe and effective tool for use in agriculture. Its use allows achieving high results without negative impact on the environment and plant health, ensuring stable yields even under adverse conditions.