Select a healthy shrub that has been growing in your landscape for at least four years. It is important that the shrub's roots are well established and the shrub's ultimate size can be estimated. Even though a 4-year-old shrub will still get larger, it is easier to plan for the ultimate size now than when it was first planted.
Purchase an annual vine or a clematis perennial vine to share the space with the shrub. Most perennial vines will be too aggressive for this siting, but clematis are an exception. They are very happy to grow at the feet of a shrub. Select a vine that grows in the same sun or shade conditions as the shrub. Clematis grow well in full sun or partial shade.
Dig a planting hole for the vine about 2 feet away from the current drip line of the shrub. The drip line is an imaginary line on the ground around the perimeter of a plant where the foliage ends. Rain does not typically fall inside the drip line. That is why it is important that your vine be outside the drip line.
Add fertilizer and soil amendments as needed for the vine you are planting. Clematis benefit from a shovelful of compost and additional super-phosphate or bone meal mixed in at planting time.
Assist the vine tendrils to reach the lowest shrub branches as it first starts to grow. A piece of jute attached to a small stake at the base of the vine and tied to a shrub branch will provide support until the vine grows taller.
Feed and water the vine throughout the season as needed. The vine will find its way and meander in and around the shrub as the season progresses. Depending on the vine, you may need to help guide the stems initially.