Window Flower Box Plans

If you want to learn more about window flower box plans you have to take a close look over the free plans in the article. This must be one of the simplest DIY projects on this blog, because I assert anyone can build this with basic tools. I have designed this planter box so you get an optimal result between costs and looks. You can easily adjust the size of the planter box to suit your needs.

If you want to get the job done in a professional manner, we recommend you to plan everything with attention, as to prevent costly mistakes and to build a professional garden project. Invest in high quality materials, such as cedar, pine or redwood, as the bench will be exposed to all kinds of weather. Apply a few coats of paint over the components, to enhance their appearance and to protect them from bad weather.

Window Flower Box Plans – PDF Download

Building a window planter box

Materials

• 1 – 3 pieces of 1×8 lumber – 36″ long, 2 pieces – 6 1/2″ long BOX
• 2 – 6 pieces of 1×2 lumber – 7 1/4″ long, 4 pieces – 5 3/4″ long, 2 pieces – 34 1/2″ long TRIMS
• 3 – 2 pieces of 1×2 lumber – 9 1/2″ long, 1 piece – 37 1/2″ long, 1 piece of 1×1 lumber – 34 1/2″ long TRIMS
• 4 – 1 piece of 1×3 lumber – 8″ long, 1 piece – 8 1/2″ long, 1 piece – 8 3/4″ long 2xSUPORTS

• 1 piece of 1×8 lumber – 12′
• 3 pieces of 1×2 lumber – 8′
• 1 piece of 1×3 lumber – 6′
• 1 1/4″ nails
• 1 5/8″ screws
• wood glue, stain/paint

Tools

• Hammer, Tape measure, Carpentry square
• Miter saw, Drill machinery, Screwdriver, Sander, Router
• Safety Gloves, Safety Glasses, Respiratory Mask

Time

• One weekend

STEP 1: Building the window box

Assembling the planter box

The first step of the project is to build the box. As you can see in the free plans, you need to cut 3 pieces of 1×8 lumber at 36″. Lay the slats on a level surface and then align the edges with attention. Drill pilot holes and insert 1 5/8″ screws to lock everything together tightly. Make sure the corners are square and leave no gaps between the components.

Fitting the end pieces

Next, you have to fit the 1×8 pieces to the both ends of the planter box. Align the edges and leave no gaps between the slats. Drill pilot holes and insert 1 5/8″ screws.

STEP 2: Attaching the trims

Side trims

In order to enhance the look of the window flower box, you need to attach 1×2 trims to the exterior. Align the edges flush and use glue and 1 1/4″ nails to secure them into place.

Front trims

Fit the 1×2 trims to the front of the planter box. Align everything flush and insert the nails.

Fitting the top trims

Attach the 1×2 and 1×1 trims to the top of the planter box. Use a miter saw to make the 45 degree angle cuts. Use 2″ nails to secure the trims into place tightly.

STEP 3: Building the braces

Building the supports

Use 1×3 lumber for the window box supports. Cut both ends of the brace at 45 degrees. Assemble everything with glue and 2″ nails.

Fitting the supports

Fit the supports to the walls and secure them into place with screws. Attach the window flower box and center it to the supports.

How to build a window box

Make sure you take care of the finishing touches. Fill the holes with wood putty and then smooth the surface with 120-220 grit sandpaper. Apply a few coats of paint or stain to protect the components from the elements.

8×8 Garden Shed Plans

This is a cool and relatively simple to build garden project. You can make the window box larger, but still use all the techniques described in the tutorial. Check out all my planter plans HERE.

This diy project was about window flower box plans. If you have enjoyed the free project, I recommend you to share it with your friends, by using the social media widgets. You can always save the plans as PDF or Print them using the floating widget on the left side of the screen (working only on PC or laptop).