Answer : Generally speaking, you should hire a landscape architect when you are looking to create an outdoor space that is both functional and aesthetically pleasing. A landscape architect can help you to create a plan for your space that takes into account your specific needs and the overall look and feel you are hoping to achieve. In addition, a landscape architect can also provide guidance on things like plant selection and placement, hardscaping materials, lighting, and more. If you have a complex project or simply don't know where to start, hiring a landscape architect may be the best option for ensuring your project is successful.