The answer to 'when to patio installation' is that the best time to install a new patio is typically in the spring or fall. During these seasons, the weather is mild and dry, making it ideal for outdoor construction projects. The ground is also more stable and less likely to shift or settle, which can cause issues with the patio surface.
In the spring, the soil has had time to thaw and dry out after the winter, and the temperatures are comfortable for outdoor work. Fall is also a great time, as the hot summer temperatures have passed and the ground is still warm enough for the concrete or pavers to cure properly.