Garden decking can be expensive, but it doesn't have to be. There are a few things you can do to keep the costs down. First, consider the materials you want to use. Pressure-treated lumber is typically the most affordable option, but it may not be the most durable. Composite decking is more expensive, but it's less likely to rot or warp over time. Second, think about the size and shape of your deck. A simple square or rectangle will be cheaper than a complex design with multiple levels. Finally, don't forget to factor in the cost of installation. If you're handy with tools, you may be able to save money by doing it yourself. Otherwise, you'll need to budget for professional installation. With a little planning, you can create a beautiful garden deck without breaking the bank.