The renamed West Six Garden Centre in Hammersmith, west London, is being redeveloped. North One plant area director Louise Alhadeff will manage the centre. Gingko will continue its landscaping and growing businesses at other sites.
Henderson has taken over a 12-year lease of the property, which is owned by Hammersmith & Fulham Council, with five years left and an automatic right of renewal.
She said the loss of garden centres to development elsewhere was "a tragedy", referring to Capital Gardens' plans to sell its Highgate Garden Centre in London for £6m for housing development.
"I believe garden centres are vital facilities for local areas and I'm sad they are being lost because people make more money selling them for three or four houses to be built on site," added Henderson.
A Capital Gardens representative said the redevelopment of the Highgate centre was subject to planning permission. Haringey Council confirmed that an application had been lodged.