How to Build a DIY Deck Railing Planter Box
Few things transform a deck faster and more beautifully than a few DIY deck railing flower boxes. Planter boxes can save you space when designing your deck. While taking up minimal space, rail planters allow you to add natural beauty to your deck in the form of colorful blooms, herbs, and other ornamental plants. Learning to build deck rail planters is a suitable project for beginners and you can generally complete the job in less than four hours.
Requried Materials for a DIY Railing Planter
Prior to selecting materials, you’ll want to determine the size of the planter boxes you’d like to make. Building a pair of matching 48” planters will require:
- One 1”x 6”x8’ board
- Two 1”x8”x8’ boards
- Three 1”x2”x8’ boards
- 96” of nylon or vinyl liner
- Woodworking adhesive
- 80/150 grit sandpaper
- 1-¼” Wood screws
- 2” Galvanized nails
- Stain or paint (Note: Stain or paint is not needed if you are using composite to build your planter.)
If you use wood material, like cedar, the cost to build each planter may amount to around $30. Similarly, building your planters with composite would cost about the same as cedar [source], but may require less-upkeep. However, pressure-treated lumber is a less expensive alternative that can work equally well.
Required Tools for a DIY Railing Planter
- Worktable
- Hammer
- Clamps
- Carpenter’s square
- Power drill with a flat bit
- Table saw
- Tape measure
- Circular saw
How to Build Deck Rail Planters
You can modify the design of your planters to better fit its intended space. For instance, if your deck was designed with a shorter rail, you could easily make these 48” planters a little shorter to fit. You just have to follow a few simple steps.
Step 1 – Cut Boards and Assemble the Box
Cut the 1”x8” boards to the desired length of your sides, and then cut a matching length of your 1”x2” boards for the trim. Cut two pieces at 1″x8″x5-1/2” for the ends. Form a box shape from these cuts. Apply woodworking adhesive along with each point where two boards meet. Once the glue has dried, you’ll add screws to more securely hold the boards in place. Drilling the screws into the intersection of the two boards. Measure the inside dimensions of your box, then cut and assemble the bottom of your planter.
Step 2 – Transform the Box into a Planter
Using a flat ½” drill bit, create several drainage holes along the base of the planter. This will help to ensure your plants are not overwatered and that water does not pool at the base of your planter.
Step 3 – Finishing Touches
Sand down rough spots and adhesive residue that may have seeped out, then use a moist cloth to wipe away residue. While the planter is drying off, use your bottom board measurement to cut a nylon or vinyl liner for the base of the box. Allow the planter to finish drying before applying stain or paint. If you use composite to build your planters, paint or stain will not be necessary. However, if you do paint or stain your planters, allow them to dry again before adding soil.
How to Secure Railing Planters?
How do you attach planters to handrails? You have several options, but the simplest and most secure choice, if you have a wooden railing, is screwing them into your railing. Using a single woodscrew on each end of the planter is typically sufficient for holding them in place.
However, some people are understandably hesitant to drill into their deck’s railing. Another option for securing your deck railing planter is to purchase an attachment bracket for a hardware store. Brackets may be easier on your railing and can allow you to lift and move your planters as needed.
Building your own railing planters are an easy and inexpensive DIY project that can add more life, greenery, and color to your deck -- all while saving precious space.
Glass Deck Railing Ideas and DIY Installation Tips
All glass panels used for deck railings must be safety-tempered and shatter-resistant. Learn how to install glass railing panels and get ideas for your deck.
Top 18 Deck Railing Ideas & Designs
Railings add the finishing touch to your deck. Get inspired by these deck railing ideas and styles from Decks.com and make your outdoor space unique.
Deck Skirting and Fascia
Skirting can be an attractive feature that can be added to any low-level deck.
How to Install Post Cap Lights
Follow our step-by-step instructions to install low-voltage post cap lighting.
Best Deck Stains
Looking to breathe new life into your deck by staining it? Check out our recommendations for the best deck stains to protect your wood deck.
More Helpful Resources
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights
5 Cable Railing Ideas to Inspire Your Deck or Porch Railing
Cable railing adds a modern touch for those looking to add a unique twist to their deck or porch. These top ideas offer inspiration and guidance on cable railing for your deck.
Top 18 Deck Railing Ideas & Designs
Railings add the finishing touch to your deck. Get inspired by these deck railing ideas and styles from Decks.com and make your outdoor space unique.
Cocktail Railing Considerations & Ideas
A cocktail rail is the ideal enhancement for a deck railing. Explore what to consider when introducing a drink rail to your deck.
Deck Skirting Ideas
Deck skirting offers more than aesthetics. From added storage to critter deterrence and concealing structures, explore our top ideas for your backyard's transformation.
Building an Outdoor Kitchen? Here’s What You Should Consider Before You Start
Building an outdoor kitchen is an investment that can add value to your home. Learn what you should consider before building an outdoor kitchen on Decks.com.
Eco-Friendly Backyard: Tips and Ideas to Green Up Your Space
Living a more sustainable lifestyle can start with a few simple changes in your backyard. Learn how to create a more sustainable backyard with Decks.com.
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights