The new growth area will be well-being, said Connel, who predicts that garden centres in the not-too-distant future will introduce health spas for women - and men too.
"One atypical garden centre has a fantastic spa already - Daylesford Organic in Gloucestershire. And Bents in Cheshire is heading into that direction too," said Connel.
"Escapism and nurturing are becoming very attractive to consumers. Independent garden centres are looking to provide sanctuaries from our busy and all-consuming lifestyles."
Connel added: "We're learning a lot about well-being as a category in garden centres and how to look at product ranges that might help you think about services you can provide to connect with consumers looking at health and beauty."
Potions & Possibilities commercial director Jackie McKellar said: "Spa-type areas (especially) attract female customers. "Spa products appeal to women's interest in products and services that help connect with nature.
"Aromatherapy and related therapies based on plants have a commercial value and compare well to prescriptive medicine."
McKellar hopes to speak at a Glee exhibition seminar at Birmingham NEC next September on this subject.