Category 2000 contains the angled growing systems. The plants are thus grown up and then drawn (guided) horizontally over to windows and doors. From time to time, the vertical area of the growing field usually only serves for the guidance of the stem which is usually without leaves - then only one line is used. Roses, grapevine, and strong Clematis like more parallel cables to lurch from side to side. 1 line systems prevent entanglement. Some plants - particularly Wisteria - need increased effort to grow and stay in horizontal positions, then angled systems are only partially suitable. Find out more at the Climbing Plants and at the Planning sections.