And many might wilt slightly on a hot afternoon but revive by evening. It's important to provide support at planting time. Some annual vines, even when planted just 3 inches away from the support, will spend days slowly whirling around, reaching blindly for a support in an eerily intelligent way. That time and energy could be put into climbing and developing foliage and flowers. At planting time, if the support can't be placed next to the seed, put a short twig into the ground leading from the seed to the support.
Most vines climb by twining rather than clinging.
This twining habit makes them even easier to cultivate. On a building or other smooth, flat surface, a trellis helps. Construct one of wood, string, or even monofilament fishing line, which creates a nearly invisible support. Once these vines are established, few pests or diseases bother them. Their height allows good ventilation, and because they're annuals, diseases seldom overwinter.