r/DripIrrigation

I am about to have irrigation designed for my backyard and I am still working on where the plants are going to go, some areas are pretty clear but may move a few plants around once I start choosing everything, so I am trying to figure out if the irrigation layout needs the final plant spots first or if the main zones and lines can be planned now and adjusted later, I am thinking about the lawn, garden beds and a few larger plants, so I want the water coverage to make sense for each area, would it be better to finish the plant layout first and then have the irrigation designed, or can the irrigation plan come first and the planting details follow?