An accent that can be used all through the year is birch. It's an up north tree, but you can order the products all online. It's a beautiful white bark with interesting pattern. There are so many uses for it.
Decorating the aisle, using the pattern for a cake or invitations, place card holders, the list goes on and on. Birch pairs well with any wedding color as well since it's black and white. If you haven't considered using birch accents, just google to see more pictures and we think you will be convinced!