For nearly 2,000 years there has been documented evidence of what not to grow with walnut trees. Pliny the Elder, the famous historian wrote “The shadow of the walnut tree is poison to all plants within its compass”. This allelopathic property is a toxin that helps to preserve the walnut tree from competitors. Back in the 1800s scientists discovered the compound juglone was responsible for killing near by plants. This compound is found in the leaves, branches, fruits, and is also excreted from the roots. Not all plants are bothered by juglone, but those that are will suffer from yellowing… → Read More