Whether you’re a pro gardener, a novice looking to flex your green thumb, or an urbanite with zero outdoor space, window boxes are a low-commitment way to grow summer plants, flowers, and herbs.

Window boxes have a certain reputation. They’re quaint, they’re cottage-core, they’re fussy. And while there are reasons for these preconceptions, there’s a lot more to the window box than all that.

Boost curb appeal this season with these winter window box ideas including festive greenery, hardy flowers and bright holiday accents. Imagine a row of frosty white birch logs nestled between lush, ...