Sun July 3rd. Hillbark Open Garden, Bardsey. Open 11-4.30. £4. This is part of the NGS charity and is a gorgeous private garden. It only opens twice a year.
Thurs Aug 11th. Wentworth Garden Ctr and walled garden, Rotherham. Open 9-5.30 pm Check out the website, looks amazing. There is charge of £1 to get into the garden, also charge for the farm, everything else is free.
Sept. Date to confirm. Breezy Knees.
Millrace also has Open Garden for charity:
Sun June 5th, Thurs July 28th, Sun Aug 21st. Cost £4, 1-5pm