First of all, you need to decide whether you want to design a formal rose garden or an informal one. These are two major types of rose gardens and people chose one according to their interests and requirements.
Choosing a shape for the rose garden is the most important step because the shape of a garden can grab the attention of people immediately. Usually rectangular or square shapes are adopted while designing a rose garden.
Now you need to draw straight rows of roses in your yard for growing different types of roses. Make sure you plant the same type of rose in one row. Do not plant different types of roses in the same lane as it will affect the overall look of your rose garden in a bad way.
Make the design of your rose garden in a way that will assist you in watering the plants in an easy manner. You also need to maintain a reasonable distance between the plants because after growing, these plants will start merging with the surrounding plants.
You need to find the most prominent place in your garden and plant the most beautiful and healthy plant at this spot. It will give your rose garden the perfect look after all the plants have grown up.
For providing required support to the roses, you can surround your garden by using latticework that helps in keeping the fragile plants standing.
While designing a rose garden, you should choose the place very carefully by keeping all aspects in view. Make sure that the place gets proper sunlight and there should also be proper shade that can be used to save flowers from the heat of the sun, especially in summer season.