Use reclaimed wood like pallets, fence boards, or scrap lumber
Choose a simple rectangular shape to reduce materials
Build a low bed to use less wood and soil
Skip expensive cedar and use untreated pine or other free lumber
Check local listings for free or cheap materials
Use cinder blocks, bricks, or stones instead of wood
Line the bed with cardboard to suppress weeds
Fill the bottom with branches, leaves, and yard waste before adding soil
Mix topsoil with compost to lower soil costs
Buy soil in bulk instead of bags
Start with one bed and expand later
Use screws you already have or buy in bulk
Keep the bed narrow so you do not need extra support
Place the bed on level ground to avoid extra framing
Build directly on soil instead of adding a bottom
Use salvaged hardware cloth or mesh only if needed
Paint or seal only if you already have safe leftover materials
Ask neighbors, construction sites, or local groups for leftover wood
Make the bed modular so you can add sections later
Use simple corner stakes instead of decorative joinery
Avoid expensive accessories like caps, liners, or trim