Matching the right window box to your home can add curb appeal, but there are many things to consider before making a final decision. What materials should the box be made of? How big should the box be? What size and depth is best for the plants that you want to pair with your home?
Window Box Length Tips
Once you’ve settled on a flower box material and style, deciding how long your new window boxes should be is the next big decision. In general, window boxes look best if they are the same width as the window, but there are exceptions to the rule. For example, if your home has shutters or wide exterior trim pieces, you may want your window boxes to run under these architectural features or sit slightly inside. Since many windows are around three feet long, almost every window box style is available in 30″ and 36″ lengths.
When placing a window box on a deck or porch railing, it should fill the space without making the railing unusable. Leave several inches between the end of the window box and any steps so that your growing plants don’t make these spaces unsafe. Use a cardboard cut-out or chalk outline to help yourself visualize the perfect window box for your space if you’re unsure of the right size.
For a very long window, railing, or fence, you can either mount several small window boxes or one large one. Most Hooks & Lattice window boxes can be purchased in 60″ and 72″ lengths, and many can be manufactured in even larger custom sizes. We’ve built flower boxes over 100″ inches long! Long window boxes look dramatic and impressive; just remember that you’ll probably need some serious help to lift and mount them.
Window Box Depth & Width
Window box suppliers like Hooks & Lattice usually offer our most popular boxes with standard dimensions and extra-large boxes that are wider and deeper than usual. Standard boxes are a good fit for many homes, but sometimes the extra-large flower boxes are more appropriate. Organic Gardening magazine recommends measuring the height of your windows before settling on a size. A box that is 20 to 25 percent of the height of your window feels adequately robust on most homes. If you choose very large brackets for your flower boxes, consider their visual impact in your decision as well.
Bigger boxes have a practical benefit: Because they hold more soil, they won’t dry out as quickly, and so they will allow you to plant less drought-tolerant plants. For this reason, we recommend that gardeners in hot climates use XL hayrack window boxes instead of hayrack planters in normal sizes. Deep flower boxes also work better for perennial plants, which tend to root more deeply than annuals. Extra-large boxes are more flexible to plant, even allowing multiple rows of small annuals if you want to create layers of colors.
On the other hand, shallow boxes look nice on homes with delicate features, since the smaller box and brackets won’t overwhelm the home’s architectural details. Small window boxes won’t stand out in an obvious fashion, instead providing a subtle space for gardening. Our Tapered Cedar Window Box is just 6″ high, putting the spotlight on your plants. These smaller boxes are great for annuals, herbs and artificial plants. Because they hold less soil, they’ll weigh less, making them easier to lift and mount.
As with any décor decision, you should be aware of these design suggestions but ultimately choose whatever looks best to you. Don’t be afraid to defy convention! With some skill, almost anything can look great. Above all, window box gardening should be a fun and relaxing way to express your creativity. Experiment with different options and find the one that suits your style. Need flower box sizing advice? Comment below and we’ll let you know what we think!