If you want to design your own landscaping, there are software packages available that will allow you not only to execute a design template, but to render it in three dimensions. And, you are not required to have any drawing skills whatsoever to generate a professional looking proposal.
Realtime Design Architect 2011 will allow you to design complete landscapes which include yards, gardens, swimming pools, ponds, decks, fences, patios, and more. You can create two and three dimensional renderings of what the new landscape will look like. The software includes thousands of different types of plants, shrubs, and trees, so by just clicking on the name of the desired plant, it will place a three dimensional rendering of that plant in your template. In fact, the software contains 16,000 objects and 6,700 realistic looking plants. The CAD drawings are rendered to the exact scale that you specify so that you are literally creating a picture of what your finished landscape will look like. You can even design in irrigation systems, borders for planting, decks showing the proper wood selection, and other design features of your landscape. The software will simultaneously render two and three dimensional design views of your landscape creation. The plant renderings are based on real photographs so that they appear authentic. And you can select your choice of wood or metal fencing and paver stones, bricks, or stones for the patio and walkways. The plants are even listed by USDA Hardiness Zones to help you to select only plants that will thrive in your area. This is very easy software to use and retails for $349.95.
The other top software package is PRO Landscape which retails for $1,395. It does provide thirty different templates and all of the aids you will need to create a professional looking proposal. It is expensive and is more designed for the professional landscaper than for the homeowner doing this for him- or herself.