Noel Kingsbury is a well-known designer, commentator, and writer on plants, gardens, landscape, and the environment. His doctorate in horticultural ecology from the University of Sheffield focused on the selection and management of ornamental perennials and he is still engaged in active research in this field. Noel is interested in combining natives and non-natives in ecological planting schemes and a passionate advocate for sustainable plant combinations that require minimal intervention from the gardener. He trials plants and gardens at his home on the border between England and Wales and travels widely.

Piet Oudolf is among the world’s most innovative garden designers and a leading exponent of naturalistic planting, a style that takes inspiration from nature but employs artistic skill in creating planting schemes. Oudolf's extensive work over 30 years of practice includes public and private gardens all over the world. He is best known for his work on the High Line and Battery Park in New York, the Lurie Garden in Chicago's Millennium Park, Potters Field in London, and his own private garden at Hummelo in the Netherlands.