The Hidden Danger of Black Walnuts: Juglone and Other Facts
Are there poisonous walnuts? The answer is yes—specifically, black walnuts (Juglans nigra) can be dangerous. Known for their toxicity, these trees produce a potent chemical called juglone, which can harm nearby plants and sensitive animals.
An Unpleasant Toxic Surprise
Black walnut trees are notorious for their toxic properties. The chemical juglone they produce is incredibly strong, capable of damaging and even killing off vegetative growth around these trees. Interestingly, horses exposed to black walnut shavings have also experienced issues, likely due to similar effects.
Are Black Walnuts Safe for Humans?
Fortunately, when it comes to human consumption, black walnuts are generally safe for those without nut allergies. Unlike peanuts, which are specifically recognized by the FDA, other nuts are considered to be in the same allergen category as peanuts. However, if you are allergic to shellfish, you might also experience an allergic reaction to black walnuts.
Opening Black Walnuts
Although black walnuts are safe for consumption, they are not as convenient as store-bought varieties. To open them directly from the tree requires a significant amount of patience. If you decide to try it, be prepared for a tedious process. The outer shell of the green walnuts can be tough to crack, and even after removing the outer hull, you still need to pierce the inner shell.
Traditional Uses and Challenges
In my childhood, our walnut trees provided us with a festive project for Christmas cakes. My mother would gather walnuts from late September through October and would wear protective gloves to hack through the tough outer shell. The process is particularly time-consuming, and only the whole halves were kept for decoration.
Recalling that childhood, the cakes would feature alternating walnut halves and maraschino cherries. My brother would constantly snack on the walnuts, and I would often remind him, emphasizing, "Dangerous, No. When very ripe and there is a breeze, the walnuts will fall on you like miniature torpedoes sent by vengeful gods. But actually dangerous, No. Pain in the ass, Yes." The challenge of opening the walnuts is a testament to their protective outer shell.
Modern Solutions and Family Traditions
As my mother aged, she continued her tradition of making Christmas cakes. Not only did she maintain the recipe, but we now had to send six cakes across the country to where our sheep farm was located. Fortunately, our neighbors, who have walnut trees, provided us with fresh nuts each year. However, my mother had a clever solution: she would mail the shelled nuts instead of the whole ones, thus avoiding the laborious task of opening them.
Reflecting on these memories, it is fascinating to think that my mother had always known this alternative method. What a relief to have a modern solution to an age-old problem. If only I could text my brother Tom, I would share that moment of revelation.
In conclusion, while black walnuts pose no significant threat to those without nut allergies, their natural defenses make them a challenge to harvest. Whether you enjoy the nuts in their natural form or in a delicious Christmas cake, understanding the nature of these nuts can enhance your appreciation of this versatile and occasionally challenging fruit.