I use Irrigation-V5 in combination with a flow meter to manage my sprinklers. Irrigation-V5 basically tracks the amount of moisture in the soil based on humidity, the amount of sunshine, temperature, rainfall, and of course when the sprinklers turn on and add water. It feels like magic. They can go for months in the winter without running, all on their own and then pop back on when things warm up and dry out, slowly decreasing the intervals between watering as summer approaches.

Really makes me want to integrate the whole thing into an ESP32 with a display so such a thing doesn't require HA.