This is one of my favorite and most quirky substitutions for flowers! Button flowers add a layer of whimsy and fun to any wedding celebration. And it's not just for the bouquets- you can make bouttonnieres, corsages, and even centerpiece/decor items with buttons! It might take alot of time to round up the buttons if you wanted to DIY these projects, but there are lots of resources online for bulk buttons. And if you're not the DIY type, there are some really fabulous ETSY sellers (a few listed below) that make these gorgeous creations that would still leave you having spent less than real flowers!
Check out some of these fab examples I've rounded up:
Past Posts in Flower Alternative Series:
Part 1: Paper
Part 2: Feathers