Wheeling a wheelchair on grass can be challenging and requires more effort than moving on a flat surface. The wheels can sink into the ground, making it difficult to move forward. However, it is possible to wheel a wheelchair on grass with the right technique and equipment. Wide wheels or inflatable tires can help distribute the weight and prevent sinking. Pushing with a steady and rhythmic motion can also help maintain momentum. It is important to be cautious and avoid steep slopes or uneven terrain to prevent accidents.