The answer to 'best time for irrigation system' is that the best time to install or maintain an irrigation system is typically in the spring or fall, when temperatures are mild and there is less demand on the system. During these seasons, the ground is easier to work with, and any necessary repairs or adjustments can be made without putting too much stress on the plants.
In the spring, you can prepare the system for the upcoming growing season, ensuring it's functioning properly and making any necessary adjustments. In the fall, you can winterize the system to protect it from freezing temperatures and damage during the winter months. This helps extend the lifespan of your irrigation system and ensures it's ready to go when you need it the most.