| TYLER, Rupert David ACTIVE | Director | 07 Jun 2023 | | England | January 1962 | The Garden Museum, The Garden Museum, Lambeth Palace Road, London, SE1 7LB |
| DWYER, Daniel John RESIGNED | Nominee Secretary | 28 Jan 1994 | 07 Feb 1994 | | | 6 Brimstone Close, Chelsfield Park, Chelsfield, Kent, BR6 7ST |
| HALFORD, Roger, Dr RESIGNED | Secretary | 26 Jul 2006 | 30 Apr 2007 | | | 247 Mayall Road, London, SE24 0PQ |
| NORRIS, Melanie Francesca RESIGNED | Secretary | 07 Feb 1994 | 26 Jul 2006 | | | 7 Coatham Place, Cranleigh, Surrey, GU6 7EW |
| CAMPBELL-PRESTON, Colin Arthur RESIGNED | Director | 15 Dec 2010 | 25 Apr 2018 | United Kingdom | April 1958 | The Garden Museum, The Garden Museum, Lambeth Palace Road, London, SE1 7LB |
| DAVIDSON, James RESIGNED | Director | 12 Nov 2003 | 01 Mar 2011 | United Kingdom | February 1943 | Forwood East, Well Hill, Mitchinhampton, GL6 9AB |
| DOYLE, Betty June RESIGNED | Nominee Director | 28 Jan 1994 | 07 Feb 1994 | | June 1936 | 8 The Bartons, Elstree Hill North, Elstree, Herts, WD6 3EN |
| DWYER, Daniel John RESIGNED | Nominee Director | 28 Jan 1994 | 07 Feb 1994 | | April 1941 | 6 Brimstone Close, Chelsfield Park, Chelsfield, Kent, BR6 7ST |
| FANE, Mark RESIGNED | Director | 08 Jun 2011 | 07 Jun 2023 | United Kingdom | June 1958 | The Garden Museum, The Garden Museum, Lambeth Palace Road, London, SE1 7LB |
| HALCROW, Michael David RESIGNED | Director | 10 Jun 2021 | 20 Oct 2022 | England | January 1964 | The Garden Museum, The Garden Museum, Lambeth Palace Road, London, SE1 7LB |
| KAUFMANN, Michael RESIGNED | Director | 01 Mar 2011 | 15 Dec 2012 | United Kingdom | September 1953 | The Garden Museum, The Garden Museum, Lambeth Palace Road, London, SE1 7LB |
| NEWTON, Barry John RESIGNED | Director | 26 Oct 2016 | 10 Jun 2021 | England | September 1968 | The Garden Museum, The Garden Museum, Lambeth Palace Road, London, SE1 7LB |
| NICHOLSON, Lorna Rosemary RESIGNED | Director | 07 Feb 1994 | 20 Jul 2000 | | July 1920 | 74 Coleherne Court, Old Brompton Road, London, SW5 0EF |
| NORRIS, Melanie Francesca RESIGNED | Director | 07 Feb 1994 | 26 Jul 2006 | | March 1957 | 7 Coatham Place, Cranleigh, Surrey, GU6 7EW |
| OGILVY, James Donald Diarmid, The Hon RESIGNED | Director | 28 Jul 2000 | 15 Oct 2010 | United Kingdom | June 1935 | Sedgebrook Manor, Grantham, Lincolnshire, NG32 2EU |
| SAUNDERS, Nicola Jane RESIGNED | Director | 23 Jun 2021 | 11 Oct 2022 | United Kingdom | August 1971 | The Garden Museum, The Garden Museum, Lambeth Palace Road, London, SE1 7LB |
| SMEETON, Phyllida RESIGNED | Director | 07 Feb 1994 | 31 Jan 1999 | | November 1941 | The Old Rectory, High Street, Headley, Bordon, Hampshire, GU35 8PW |
| THOMSON, David Richmond RESIGNED | Director | 19 Jun 2001 | 31 Oct 2003 | | October 1934 | Coppice House, Manor Lane,Glaston, Oakham, Leicestershire, LE15 9BT |
| WILKINSON, Henry Russell RESIGNED | Director | 07 Jun 1999 | 30 Sep 2000 | | March 1936 | 4 Avenue Road, Epsom, Surrey, KT18 7QT |