Oxfordshire Trellis ExtensionOxfordshire Trellis Extension For any avid gardener or plant lover, finding enough vertical space for your climbing vines, flowers, vegetables, or runners can be a challenge. Trellising is a vital gardening tool, and beautiful trellises make attractive accent pieces or focal points. The Oxford shire Trellis is a modular wall mounted trellis, perfect for creating the classic English cottage garden look masses of tea roses, clematis, or climbing