There are many ways to decorate and plant a window box. One of my personal favorites is to use a centerpiece. For longer boxes I will often have multiple tall plants which act like spaced out centerpieces. Whenever you mix in some tall plants in the box with some low plants or vines in the front it helps give more depth and dimensions and, of course, beauty to the overall flower box. So let's cover some ideas for tall plants and flowers that work well as centerpieces for window boxes.
This is a go-to staple that works almost every time. A coleus plant usually gets tall and often has a red or purple hue to it which contrasts very well on green plants or vines in front. It's a good way to mix up color in the box and they're cheap and easy to plant.
Spikes are great because they always stand out. The long leaves of the spike can add a lot of overall size to the box. Think of spikes as the opposite of vines. They're long but they go up instead of down.
These are the small Christmas looking trees that do very well in small containers. They usually can stay in the planter year round and are a very cost effective solution to not having to completely dig out and replant your window boxes every season. They come in many sizes from dwarf conifers for a shallow window box, to mini-trees that stand several feet tall and are perfect for square shaped ground planters.
Things like wreaths, scarecrows, and flags are easy decorations that can be added for various holidays. In most cases they can just be dropped right into an already existing window box to create a focal point at the center of the flower box.
I like sage as a centerpiece for a small window box because of the blue and purple colors always stand out for me and sage gets very tall. Sometimes I'll use sage not as the actual centerpiece by as side plants on either side of the centerpiece because it is a little more thinned out it won't over compete with a centerpiece but compliment it. This works really well at the 1/4 and 3/4 points of a window box around 5-6 feet long.
About the Author
Matthew Buquoi is the owner of Flower Window Boxes, a no rot window box company based in Atlanta, GA that manufactures and ships fully assembled custom window boxes all over the country.