What kind of grout should you use for a natural stone patio?

For a natural stone patio, it's best to use a sanded grout designed for outdoor use. Sanded grout provides better durability and flexibility, which is essential for handling the natural expansion and contraction of stone. Additionally, ensure it is resistant to moisture and mildew to withstand outdoor conditions. Always check the manufacturer's recommendations for compatibility with the specific type of stone you are using.