Metal flower boxes come in a variety of materials, ranging from aluminum and stainless steel to galvanised iron. Each material offers unique benefits that cater to different gardening needs. Aluminum flower boxes, for instance, are lightweight and resistant to rust, making them ideal for outdoor use in various climates. Stainless steel, on the other hand, is known for its strength and sleek appearance, often becoming a centerpiece in modern garden designs. Galvanised iron boxes offer a rugged aesthetic and excellent durability, perfect for creating an urban garden with character.