Jointly introduced by North Dakota State and South Dakota State Universities, in collaboration with the Arnold Arboretum, 'Meadowlark' has consistently bloomed in both states. Flower buds have successfully survived temperatures of -35oF. Flowers are a bright yellow. Meadowlark' has dark green leaves. Northern Sun' is an introduction of the University of Minnesota. Grown at the Minnesota Landscape Arboretum in Chanhassen, 'Northern Sun' has bloomed when temperatures dropped to -30oF. The clear yellow flowers cover the plant in early spring.
Foliage is a medium green.
The vigorous shrub reaches a height and spread of 8 to 10 feet. Because of its large size, 'Northern Sun' is best suited for a tall hedge or screen. Other hardy forsythia varieties include 'Northern Gold', 'New Hampshire Gold', and 'Vermont Gold'. These hardy varieties are available at many local garden centers and mailorder companies. Iowa State University , Ames, Iowa.