White option: white heather plants for smaller designs, planted in painted grey pots.
Autumnal option: huge branches of crab apples and rose hips to create a tree effect, which we would put in zinc vases. by Ken Marten, via Flickr
White option: we would put a mass of snowberries in zinc vases to create a tree effect.
Moss in zinc planter
Google Image Result for http://4.bp.blogspot.com/-6Z76Nk3pnO8/Tq2mk8uFVcI/AAAAAAAABSA/5zBwwb0vRoc/s1600/white%252Bheather.jpg
Mind your own business plant