How to Build Wooden Planters from Decking: A UK Guide

Decking boards are an ideal material for building planters due to their durability and resistance to weather conditions, especially in the UK where rain is frequent.

Using leftover decking is also an eco-friendly option, reducing waste and giving new life to materials that might otherwise be discarded.

Additionally, decking boards can be easily cut and assembled into various sizes and shapes, allowing for customised designs that fit your garden perfectly.

Before starting your project, gather the necessary tools and materials. Essential items include a saw, drill, screwdriver, measuring tape, and sandpaper. For the planters, you'll need decking boards, screws, and a liner to prevent soil erosion.

Ensure you have safety equipment such as gloves and goggles to protect yourself during the building process.

Step 1: Planning and Design

Decide on the size and shape of your planter. Consider the space in your garden and the types of plants you wish to grow. Draw a simple diagram to help visualise the final product.

Step 2: Cutting the Decking

Measure and mark the decking boards according to your design. Use a saw to cut the boards to the required lengths.

Step 3: Assembling the Frame

Start by constructing the base of the planter. Arrange the cut pieces into a rectangle or square and secure them together with screws.

Step 4: Building the Sides

Attach additional decking boards vertically or horizontally to form the sides of the planter. Ensure they are tightly secured to provide adequate support for the soil and plants.

Step 5: Adding a Liner

Line the inside of the planter with a durable liner. This will protect the wood from moisture and soil, extending the life of your planter.

Step 6: Finishing Touches

Sand any rough edges to prevent splinters and apply a wood preservative to protect against the elements.

Consider creative designs such as tiered planters for a cascading effect, or add a trellis for climbing plants.

• Vertical planters save space and add height to your garden.
• Incorporating a seat into your planter design can provide a functional yet aesthetic feature.

Given the UK’s varying climate, ensure your planter has adequate drainage to prevent waterlogging.

Use weather-resistant screws and wood treatments suitable for the UK's wet and cold conditions.

Consider positioning your planters in areas that receive ample sunlight to support plant growth during shorter days.

Regular maintenance will extend the life of your wooden planters. Check for signs of rot or damage and address any issues promptly.

Reapply wood preservative annually to protect against moisture and pests.

Keep the soil healthy by replenishing nutrients and ensuring proper drainage.

If you notice the wood warping, it may be due to excessive moisture. Ensure proper drainage and consider moving the planter to a drier location.

Screws coming loose can be fixed by tightening them and checking for any structural weaknesses.

Planters can be used to define garden areas, create focal points, or add elevation to your garden design.

Use a variety of plants to create contrasting textures and colours, enhancing the visual appeal of your garden.