Protecting your wooden urban planter boxes from rot is essential for their longevity and the health of your plants. The constant exposure to moisture from soil and watering will eventually cause untreated wood to decay. Fortunately, lining your planters is a straightforward and effective solution.
The primary purpose of a liner is to create a barrier between the moist soil and the wooden walls. Here are the most recommended materials and methods:
1. Plastic Liners: Using a heavy-duty plastic sheet, like a pond liner or a recycled plastic bin, is one of the most effective methods. Simply cut the plastic to size and fit it inside the box. Crucially, you must puncture several drainage holes in the bottom of the plastic liner to match the drainage holes in the wooden planter itself. This prevents water from becoming trapped and saturating the wood.
2. Landscape Fabric: This woven material is an excellent breathable option. It allows water to drain through while keeping soil contained. It is less effective at preventing moisture vapor from reaching the wood than solid plastic, but it is a good choice for plants that prefer drier conditions.
3. Combination Approach: For maximum protection, you can use both. Place a plastic liner with drainage holes on the sides and bottom, and then add a layer of landscape fabric on top of the plastic. This protects the wood and prevents soil from washing out through the drainage holes.
Before installing any liner, ensure your planter has adequate drainage holes in its base. Elevating the planter slightly off the ground with feet can also improve air circulation and further reduce the risk of rot. By taking these simple lining steps, you can significantly extend the life of your wooden planters and enjoy a thriving urban garden for years to come.