Kindly sponsored by
Monique Gudgeon, Sculpture by the Lakes
Owen Johnson (2022)
Johnson, O. (2022), 'Forsythia 'Winterthur'' from the website Trees and Shrubs Online (treesandshrubsonline.
USDA Hardiness Zone 4
RHS Hardiness Rating H6
A compact, hardy, dark-leaved forsythia with primrose-yellow flowers, available from Winterthur Gardens in Delaware from 1987 as a hybrid of F. × intermedia ‘Spring Glory’ with F. ovata (Dirr 2009).