On Sunday 28th June 2026, Longstock Gardens will be opening for the NGS from 10am until 4pm at Longstock Park Nursery, Leckford, Stockbridge, Hampshire, SO20 6EH. Famous water garden with extensive collection of aquatic and bog plants set in seven acres of woodland with rhododendrons and azaleas. A walk through the park leads to National Collections of Buddleja and Clematis viticella. A chance to visit the arboretum and herbaceous border at Longstock Park Nursery. For more information, please click here.