Black walnut grows on the eastern half of the U.S. except the northern border. Black walnut prefers moist well-drained soils, especially along streams and rivers. These trees usually grow scattered in ...

Pure stands of black walnut trees are uncommon. Black walnut grows best on lower north- and east-facing slopes with well-drained and fertile soils. Plant seedlings to supplement natural regeneration.

The genetic mechanism is similar to sex determination in many animals. Pictured, Groh with a California black walnut tree on the UC Davis campus. Credit: Sasha Bakhter, College of Biological Sciences ...

Landscaping under any tree can be challenging, thanks to the dense shade cast by the branches and the abundance of thick roots in the soil. But black walnut trees (Juglans nigra) seem to be in a ...

The American black walnut (Juglan nigra) is a tree native to North America and its hard-to-crack but flavorful and nutritious ...

like Northern California black walnut. In wild species, the ratio of male-first to female-first trees is almost 1:1. Groh and his doctoral advisor, Professor Graham Coop of the Department of ...

like the Northern California black walnut. In wild species, the ratio of male-first to female-first trees is almost 1:1. Groh and his doctoral advisor, Professor Graham Coop of the Department of ...