Yes, you can create a garden like this! Just look at the shapes: sharp spires, round globes, soft spires, and a few oddballs. Pick flower shapes in the same color family (pinks and purples, here), throw in a few silver foliage plants, and plant closely together. Its that simple!

Old Rectory, Netherbury, West Dorset, England. Conditions: Heavy clay and fertile sandy clay, mild and wet climate Highlights: Classic English garden with exuberant plantings, formal topiary, and a memorable bog garden and thornery. photo Jerry Harpur for Traditional Home