On Saturday 26th September 2026, Hall Grove School Garden will be opening from 2pm until 5pm for the NGS. Hall Grove School, London Road (A30), Bagshot, Surrey, GU19 5HZ. Formerly a small Georgian country estate, now a co-educational preparatory school. Grade II listed house (not open). Mature parkland with specimen trees. Historical features include an ice house, a recently restored walled garden, lake, woodland walks, Rhododendrons and Azaleas. There will be a plant stall at this opening; for all the details, please click here.