Black walnut trees have high levels of the toxin juglone, in all parts of the tree, including roots and leaves. Why keep black walnut trees? They are one only a few nut trees that survive in cold ...

For many urban gardeners, a black walnut is not a friendly tree. Though black walnut is valued for its fine quality timber, it has a detrimental property that inhibits many plant species from growing ...

The black walnut tree (Juglans nigra) is well-loved for its beauty and the walnuts it grows. However, the roots of this tree produce juglone, a chemical released in the soil surrounding the tree that ...

Spring gardening season is just around the corner. As you wait, you may have questions. For answers, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension ...

CLEVELAND, Ohio -- Black walnut trees, which are both native to and common in Northeast Ohio, have a divisive reputation. If you are looking to plant a new tree in a sunny spot with wet soil, black ...

Sometimes a sustainable farming practice is as simple as not doing something. That’s the takeaway from a recent project conducted by UC Davis researchers, who found that delaying irrigation of walnuts ...

In the simplest terms, a nut is an edible seed. We eat many kinds of nuts, from hazelnuts to Brazil nuts, pine nuts to pistachios. Most of the country’s nuts are grown here in California. In 2012, ...

Walnut grower Hal Crain photographed at the Crain ranch in Los Molinos. Crain is a second-generation farmer who is working with Cooperative Extension and UC Davis professors on a long-term experiment ...