Kindly sponsored by
Monique Gudgeon, Sculpture by the Lakes
Owen Johnson (2022)
Johnson, O. (2022), 'Forsythia 'Northern Sun'' from the website Trees and Shrubs Online (treesandshrubsonline.
USDA Hardiness Zone 4
RHS Hardiness Rating H7
‘Northern Sun’ was selected for its hardiness by Dr Harold Pellett and Laurie Malmquist at the University of Minnesota in 1983 from plants grown from seed collected in 1957 from a Forsythia ovata (growing with other forsythias) at the Central Experimental Farm in Ottawa, Canada (Dirr 2009). It can reach 3 m and reliably produces its clear yellow flowers in the Minnesota Landscape Arboretum (USDA zone 4b) (Dirr 2009); it is also cultivated in the harsh climate of the Betty Ford Alpine Garden, at 2700 m asl in Vail, Colorado (Royal Botanic Garden Edinburgh 2022).