Treated seeds are best for planting because they have been coated with fungicides, insecticides, or other chemicals that help protect the seeds from pests, diseases, and environmental stressors. This treatment can improve germination rates, promote healthier seedlings, and ultimately lead to higher crop yields. Additionally, treated seeds can help reduce the need for additional pesticide applications, saving time and money for the farmer. Overall, treated seeds provide a more reliable and efficient way to start a successful crop.