My hubby and I built this window box template with DIY window box brackets and allows you to remove the box from the window! Keep reading and watch the video to see how to make this simple Window Planter Box DIY!
Cut the wood to size for your window. Our window box measures (28"L x 9"D x 7.5H") so we cut (2) 7.5" pieces and (2) 28" pieces for the box. We cut (1) 19" piece in half at an angle to create 2 smaller pieces for the bracket (I'll explain more about the angle cut in the steps below).
Build the box by attaching all the sides together with screws.
Cut the brackets for the back at an angle using a table saw or circular saw.
Attach the bracket to the back of the box with the angled side down using screws.
Attach the other bracket to the house where you will be hanging it with the angled side up to slide into the window box bracket. We used screws and anchors to attach the wood bracket (3 screws total) to make sure it had enough support for heavy flowers.
Drill holes in the bottom of the box so water can drain out (you don't want water to sit inside your box! Make sure you properly drain the flowers too. We used a plastic flowerbox inside our wood box and added styrofoam peanuts in the plastic box before adding soil).
Stain or paint the window box and the bracket on the house.
Although we used pressure-treated wood, I wanted to give our wood more protection from elements so I used water-based polyurethane on it as well.
Hang your new window box, add some flowers, and enjoy the compliments from neighbors!