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 ...

Drazen_ / Getty Images Q: I have several walnut trees on my property. I noticed that one mature tree did not produce any walnuts this year. My question is why did that one walnut tree not produce nuts ...

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 ...

Urban dwellers either praise or curse the black walnut (Juglans nigra). Some find the tree troublesome because of the nuts they drop, the juglone (a natural herbicide) secreted into the soil to kill ...

WEST LAFAYETTE, Ind. - Researchers from Purdue and Colorado State universities have discovered that the fungus responsible for thousand cankers disease, a lethal affliction of walnut trees and related ...