A trellis is a framework, typically made of wood or metal, used to support climbing plants and vines. It consists of a series of vertical and horizontal slats that create a grid-like structure, allowing plants to grow upward. This not only helps the plants receive more sunlight but also enhances the aesthetic appeal of gardens and outdoor spaces. Trellises are commonly used in gardening and landscaping, often supporting plants like roses, grapes, and clematis. They can be freestanding or attached to walls and fences, making them versatile for various garden designs. Additionally, trellises can help improve air circulation around plants, reducing the risk of disease.