Just look at these fabulous varieties of artificial greenery in the picture below. The options are endless. There are so many different shades of green that can give depth and texture to any kind of flower arrangement or simply be used on their own.
These are just a few stems I have sourced for you which would complement any flower arrangement. They are easy peasy to trim, bend or mould to suit your requirements. All you need to have at hand is a pair of wire cutters.