It depends on the context and what "he" is referring to. He could be planting a variety of things such as vegetables, flowers, trees, or other plants. Without more information, it is difficult to determine exactly what he is going to plant.
It depends on the context and what "he" is referring to. He could be planting a variety of things such as vegetables, flowers, trees, or other plants. Without more information, it is difficult to determine exactly what he is going to plant.