Help & Advice

Help & Advice

How to make a timber planter box in 10 easy steps?

How to make a timber planter box in 10 easy steps

Let’s face it, life is busy. Family, mates, work and life admin take up most of your time. Building your own planter box is a nice idea, but filed under the ‘one-day’ list of things to do. But there’s sense of satisfaction with building something yourself. And this 10-step plan will have it done and dusted in a day. Too easy.

Whether you have a courtyard, cubby house or garden, a timber planter box is a great low-cost way to add colour and life to any outdoor space. Along with vibrant flowers, you can stain or paint your timber planter box for an extra pop of colour, or choose a classic finish to suit your style.

What you need:

Treated pine or another durable timber so it doesn’t rot when in contact with soil or water

Cabot’s Timbercolour Deck & Exterior Paint

Galvanised screws


Paint brush or roller

Drill or screwdriver

Soil and plants

1.Cut five pieces of timber (two long, two short, and the base) to the size you want, in order to make a rectangular box.

2. Drill pilot holes in both ends of the two shorter pieces. These holes ensure the timber won’t splinter when you insert the screws.

3. Drill three or four small drainage holes in the planter base. This will stop the soil becoming waterlogged and the plants developing diseases.

4. Paint each side of the timber with Cabot’s Timbercolour Deck & Exterior Paint. Leave to dry for two hours, then recoat.

5. Position the two sides against the base, and secure with galvanized screws. Galvanised screws will won’t rust, so are perfect for outdoor use. Use a drill or screwdriver to make sure each screw goes through each hole and into the adjoining board. (You can also use a screwdriver).

6. Repeat this technique with the two end pieces, so you have a box.

7. If you are attaching the planter to a vertical surface, do this by driving four screws through the back panel into whatever you’re attaching it to. You can add decorative brackets under the window box for additional support.

8. Put a thin layer of gravel in the timber planter box to allow excess water to drain. Cover the gravel with soil, leaving about 3cm at the top of the box.

9. Add plants and water them well.

10. Accept compliments.

Why do I need to paint my planter box?

Cabot's Timbercolour Deck & Exterior Paint is a premium acrylic self-priming exterior paint. Coating your wood in this will protect it against UV, mould and rot, keeping it looking great.

WATCH: How to restore outdoor furniture

For free, expert advice on decking, call Cabot’s on 1800 011 006, or message us by clicking on the Cabot’s Project Assistant button below.