At its roots, the New Perennial movement in naturalistic planting design is about making gardens in symbiosis with nature. It calls for a wilder aesthetic, attuned to ecology, and informed by horticulture.
Inspired by naturally occurring habitats, such plantings are designed landscapes composed of a series of interwoven plant layers together forming a community, abstracting the patterns and rhythms found in nature.
There are no rules, only guidelines for the home gardener: Reduce garden inputs, recycle garden outputs; design with biodiversity & maintenance in mind; group plants by common habitat; work with the conditions you got; invite spontaneity; use plants as a living mulch to cover ground; come fall, leave plants to stand and amend in their own debris; above all, experimentation is the key to learning.