A landscape architect can be hired at any point in a project, from the very beginning when you're still dreaming up ideas to the end when you're ready to put plants in the ground. Some landscape architects even offer design/build services, meaning they'll take care of everything from start to finish. Generally, though, it's a good idea to hire a landscape architect early on so they can help with site evaluation, designing the overall layout of your garden, and selecting plantings that will thrive in your climate and meet your needs.

A landscape architect should be hired when there is a need for a comprehensive design and implementation plan for a property. This includes site planning, grading, drainage, planting, hardscaping, and lighting. A landscape architect can also provide guidance on irrigation, water features, and green infrastructure.