Expert guidance on best practices for fertilizer usage can help farmers achieve higher yields and reduce fertilizer losses, even though they generally have limited control over their fertilizer use. Additionally, rainfall volume and timing play a crucial role in nutrient loss, with moderate rainfall at the right moment aiding nutrient infiltration and dissolution, while excessive rainfall can lead to nutrient runoff and loss, including vital nutrients like nitrogen, phosphorus, and potassium. To tackle these challenges, a nutrient recommendation system is proposed in this paper. The system utilizesan updated version of the Random Forest algorithm based on time-series data to determine the optimal nutrient amounts required by different crops, taking into account rainfall patterns and crop fertility. By using this system, farmers can enhance soil fertility, minimize the risk of leaching and runoff, and create optimal conditions for crop growth.