When setting up urban planter boxes, the question of lining often arises. While not always mandatory, lining your planter boxes serves several important purposes that can significantly extend their lifespan and improve plant health.
The primary reasons to line urban planters include moisture protection, soil containment, and temperature regulation. For wooden planters, a liner is crucial to prevent constant moisture contact that leads to rot and decay. Metal planters benefit from liners to reduce soil contact that can cause corrosion over time. Even durable materials like concrete or fiberglass can benefit from proper lining.
Drainage remains the most critical consideration. Whether you use plastic sheets, landscape fabric, or commercial liner products, ensure adequate drainage holes at the bottom. Without proper drainage, plants can suffer from root rot and oxygen deprivation.
For urban gardeners, lining also helps prevent soil from washing out during heavy rains and provides an additional barrier against potential contaminants in recycled or reclaimed planter materials. The liner material matters - landscape fabric allows better drainage and air circulation than solid plastic, which might require additional drainage holes.
Consider your specific urban environment, planter material, and the plants you're growing when deciding whether to line your planter boxes. In most cases, a proper liner will protect your investment and create better growing conditions for your urban garden.