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 ...

Related: How to Grow a Lemon Tree Indoors for Delicious Citrus Year-Round Planting a black walnut tree next to a lemon tree will cause one—or both—to suffer. They produce a chemical toxin ...