Vines climb, drag, crawl, or even remain erect without support. Some vines bear many and fragrant flowers, others bear luscious foliage or berries. Some are useful for dense or persistent leaves. The most useful vines in the landscape are perennials, but there are a few annual species that can be grown from seed. every year and still provide dramatic summer effects.
Vines are rarely considered as a tool for living shade. However, if support is provided, such as planting in porches, pergolas, or the like, strong perennial vines can quickly cover patios and areas. Wisteria, mulberry, bittersweet, trumpet vine, and Virginia creeper are a few vigorous vines that serve this purpose. The extreme vigor of these vines may require some pruning to prevent them from invading areas where they want to be lacking.
Fences, screens, or walls are sometimes long and uninterrupted. They can split the vines at length and soften the lines. Chain link or open wire fences cannot provide the desired privacy, but they are easily covered with vines. Both annual and perennial vines can be used for this purpose. Morning glories, scarlet runner bean, or moon vine are a few annual vines that can be started from seed and provide a lively summer. screening of types of structures. Perennial plants that cling to such hedges include clematis or perennial sweet pea.
Many urban lots are quite small, needing privacy around the patio area. A relatively inexpensive structure, vines can be built and covered in a much smaller space than required for shrub shelter. A vine-covered canopy is also softer and looks more natural than a canopy made of wood. It will also allow more air movement than most wooden privacy structures. Vines are also useful for maintaining a cool temperature, especially for walls that are exposed to full midday sun, which tend to get too hot in the summer.
Some vines can be attached directly to brick or stone, although many prefer to use wires or structures in which to weave the vines. In addition to their use in vertical structures, vines are also useful in horizontal surfaces and can be made in shady areas; or on banks where other plants cannot grow. Latin ivy is an evergreen vine that is often used as ground cover in shady areas. Baltic ivy is an English ivy that is among the hardiest of this group. For steep banks, vines such as the Japanese Hall’s cissanthemus can sometimes be useful.
This vine should not be the strongest among trees it can climb. Vines climb in one of three ways: pegs (sweetpea, clematis), adhesive discs or aerial roots (Virginia creeper, English ivy), or weaving stems (splendour of the morning, sweet sweetness). Properly selected vines are usually established after the food is necessary. They may occasionally think of setting them in the proper shape or keeping them within desired limits.
http://gardeningfromthegroundup.us/ornamental_vines.html
http://ppp.missouri.edu/newsletters/meg/archives/v6n1/meg6.htm