Plants make great centerpieces! They are fairly inexpensive and will last long after the wedding is over. If you are a DIY bride, plants are a great idea for you! I suggest you think about a few of these green options: olive, rosemary, dusty miller, wheat grass, succulents, myrtle, mint, hypericum, or lambs ear.
photos sources: elizabeth anne designs, style me pretty, martha stewart, and brides.