That's an excellent and very practical question! The answer, like many things in gardening, is: it depends entirely on the specific bench you purchase.
Most commercially available wooden garden benches fall into one of two categories. The first is pressure-treated lumber, commonly made from pine. These benches are infused with preservatives under high pressure, making them highly resistant to rot, decay, and insect damage. They typically come with a damp, greenish tint and are ready to be installed and used immediately. You can leave them to weather naturally to a silvery-gray, or you can stain or seal them after a few months of drying for added color and protection.
The second common type is naturally durable hardwoods like teak, cedar, or eucalyptus. These often come untreated, showcasing their beautiful natural color and grain. Their inherent oils make them resistant to rot. You can leave them to age gracefully to a distinguished silver patina, or apply a specialized teak oil or sealant to maintain the original honey-toned color.
So, how do you know? You must check the product description or ask the retailer directly. Look for terms like "pre-treated," "pressure-treated," or "ready to assemble and use." If it says "untreated" or "natural finish," you'll need to take action.
If your bench needs staining, here's a quick guide: First, ensure the wood is completely clean and dry. Sand lightly if needed. Apply a high-quality, exterior-grade wood stain or sealant with a brush, following the grain. Always work in a shaded, well-ventilated area and allow proper drying time between coats.
In short, always verify the treatment status of your bench. A pre-treated bench offers convenience, while staining an untreated one allows for customization and can extend its life. Either way, a little understanding of the wood's condition is the first step to enjoying a beautiful and long-lasting garden retreat for years to come.