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 ...

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 ...