On Sunday 5th April 2026, Overstroud Cottage Garden will be opening from 2pm until 5pm for the NGS at Overstroud Cottage, The Dell, Frith Hill, Great Missenden, Buckinghamshire, HP16 9QE. This chalk garden is on two levels. Visitors can admire antique species, including auriculas, hellebores, bulbs, pulmonarias, peonies, geraniums, herbs, succulents, and a pond. There will be a plant stall at this opening; for more details, please click here.