Decorating a backyard wedding on a budget can be done creatively while still achieving an enchanting atmosphere. Start by utilizing what's already present in the backyard, such as trees, bushes, or even a poolside area that can act as focal points for decorations. Incorporate DIY elements like homemade flower arrangements using seasonal blooms from local markets or your own garden. Use string lights or lanterns to add a warm and romantic glow to the space at night. Utilize thrift stores for vintage decor pieces such as old frames, vases, or candles holders that can add charm without breaking the bank. Lastly, repurpose items you already own whenever possible - things like mason jars, old fabric scraps for table runners, or even family heirlooms can contribute to personalizing your backyard wedding without excessive expenses.