The trust did not renew Capital Gardens' lease on the south west London centre last year and has been renovating the building ever since.
The centre opened on 29 March after a six month renovation. It's official relaunch is on 9 May.
Manager Jon Dixon left last week for family reasons and the National Trust are seeking a new manager. Plant area manager is Terry O'Brien. The Trust's Dan Cooke, who has worked for Harvey Nichols, and general manager Ed Ikin are running the centre until a new manager is found.
Dixon sourced plants from Hillier, with whom the Trust has a central contract, the Trust's own Lanhydrock nursery, Lowaters, David Austin, Devonshire Lavenders, Prenplants, Frank Matthews and peat-free bedding from L Mills, who became supplier after seeing reports of the centre's new management in Horticuture Week. Herbs are from Foxhollow. Flowervision were also considered for bedding. PT Plants supply orchids.
Maidenhead Aquatics will move back on site in June and a Westminster Stone concession, plus a conservatory concession are likely to join them.
The 5,000sqm centre has 7,500 plants for sale including 100 rose and perennial varieties, 80 shrub and fruit tree varieties and 24 ornamental tree varieties.
Compost suppliers are Vital Earth, New Horizon and Melcourt. Other suppliers include T&M, Suttons, Scotts, Hozelock, Neudorff, Sinclair, Gardena, Johnsons, Tom Chambers and Haws. There is also an extensive range of National Trust giftware, moved from its former shop, which is nearby and will now house a cafe extension.
Pleydell Smithyman advised on the centre's refit.