Yes, using a liner inside your wooden urban planter boxes is an excellent way to make them last longer. The constant exposure to moisture, soil, and the elements is the primary reason wooden planters deteriorate over time. A liner creates a crucial barrier between the wet soil and the wood, significantly reducing rot and decay.
When selecting a liner, you have several effective options. A heavy-duty plastic liner is a common and cost-effective choice. Simply ensure you puncture several holes in the bottom to align with the planter's drainage holes, preventing waterlogged soil. For a more natural approach, consider a pond liner or a landscape fabric, which is breathable but still offers protection.
The key to success is ensuring excellent drainage. Never let the liner block the drainage holes in your wooden box. Trapped water will accelerate rot from the inside. By installing a proper liner and maintaining good drainage, you can enjoy the beauty of your wooden planters for many more seasons, making them a durable and sustainable feature in your urban garden.