Every "minimalist" nursery eventually collects a stuffed animal collection that rivals a small zoo, so let the walls stay the quiet ones. This floral wall art keeps things soft on purpose, one big peony anchoring a whole scatter of smaller blooms and buds around it.
The palette stays low and easy, blush pinks, warm ivory, sage green stems that curve instead of stand at attention. Some flowers are painted in full color, others fade to a barely-there wash, like they're caught mid-thought. It reads vintage without trying too hard, and minimalist without feeling bare.
This is the print that makes a room feel considered rather than decorated. It works just as well in a nursery as it does in a reading nook or a master bedroom, which is the whole point, good pastel peony decor shouldn't expire when the kid turns five. The muted watercolor style also means it plays nicely with wood tones, brass, and whatever else is already living in the room.
Hang it where morning light hits it. Soft pink nature decor like this doesn't shout, it just quietly makes everything around it look a little more put together.