Turn a set of plant shelves into botany-themed bookshelves. Place a potted ivy on the top shelf and allow it to weave its way around the borders of the shelf structure; fill the shelves with gardening books.
A cast-iron plant shelf in the guest bathroom serves as a functional conversation piece. Place an aloe vera plant or another low-maintenance plant on the top shelf and store towels and other necessities on the lower shelves.
If your kitchen contains a window that gets abundant sunlight, place plant shelves in front of it. Fill the shelves with a small herb garden for instant access to flavorful additions for your culinary creations. Place a few of your most-used cookbooks on the plant shelves, too.