This seemed to me to be cottage garden planting density. Delicate blooms in pink, white, and purple nearly cover the antique urn in this English garden at Wollerton Old Hall. Photo by Clive Nichols Garden Photography.
The color of the flowers, the bloom time and the overall garden design are all a big part of this but, perhaps, the most important thing to consider is the amount of sun the garden plant needs. - My Cottage Garden