Chantelle Leenstra is the principal landscape architect and an award winning horticulturist at Garden Atelier. She speaks on 2GB and 2RRR radio as well as at garden clubs and garden events across Australia, and she writes for Garden Drum and Garden Travel Hub. In 2016 and 2016, Chantelle has judged the Australian Institute of Landscape Designers and Managers design awards.

Chantelle was awarded Australian Horticulture Student of The Year by the Australian Institute of Horticulture in 2014 after studying landscape architecture, horticulture and fine art at universities in Sydney (UNSW), Melbourne (RMIT) and China (Southeast University). She has worked as a horticulturist and landscape architect in Japan, The Netherlands and Thailand. Prior to starting her own business, Chantelle worked with the highly regarded commercial and residential landscape architecture firms and horticulture companies in Sydney, including McGregor Coxall, Good Manors Pools & Gardens and Jungle Horticulture.   

B. Landscape Architecture (Hons), Dip. Horticulture, Cert. III Landscape Construction, Sustainability Leadership Fellow

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Mary Matthews is a professional gardener with over thirty years experience working on Sydney's north shore and eastern suburbs. She is particularly passionate about growing orchids, tropical plants and succulents and is a member of Ku-ring-gai Orchid Society and the Tropical Garden Society of Sydney. Mary is also trained in biodynamic farming and is a volunteer bushcarer with Ku-ring-gai Council. 

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Chrisophe Sachs is a professional gardener from France with six years experience, previously managing the installation of green walls with renowned Sydney green wall expert Mark Paul. Christophe is a Fellow of the Sydney Centre for Sustainability Leadership, a world traveller and a pirate at heart.