Visualising a garden is a key part of a design process. Most of us love hand drawn sketches and plans for their soft attractive feel, and we do still use these as part of many design projects, particularly in the early stages where the flow of the space is more important than all of the detailing.
A design process can vary widely between a large or complex project or something more simple, but it will typically be completed in stages, with the amount of time and detail spent on each tailored to meet your needs and aspirations.
Garden design is typically a highly personal thing! Like your hairdresser you will want to know they understand your needs, can articulate your ideas, are able to interpret them and that you can speak up if you don’t like what they are suggesting.