Concept plans:

These are colored, scaled plans that show initial layouts for the hardscape and plant elements. The first two examples below are for the same home, showing two different potential layouts for a new patio seating area and placement of a greenhouse. The last plan is for a front yard courtyard area. 
 

Perspective and Elevation Sketches:

These types of drawings show the proposed features from a human view point, and are meant to convey stylistic and proportional elements to the homeowners (they are not construction documents).

Planting Plan:

Color rendering of final plans: