No, we do not recommend installing basketball court tiles over grass or dirt. Neither grass nor dirt can provide a surface that is flat enough for the sport tiles. Additionally, grass and dirt are prone to erosion which eventually leads to an uneven playing surface. However, installation over properly compacted gravel is possible.
You may achieve a stable surface using gravel pavers for the basketball court base. These gravel pavers are design to strengthen the ground and support the sport tiles. Gravel pavers would reduce erosion and help maintain a flat surface.The basketball court tiles are designed to be used over a solid, hard surface such as compacted gravel, concrete, asphalt, or a wooden subfloor.
The tiles are rigid, and they are well suited to cover cracked or imperfect hard flooring, but they will not accommodate significant bumps, bulges or holes, or instability that may be associated with a dirt floor or grass.