With its unique aroma, the walnut compliments both spicy and sweet food. And, of course, it's very popular in snacks. Meray walnuts have a special flavor! Harvest: The optimum harvest time for the walnut is the end of August and in the middle of September. Walnut Kernels are a delicious and versatile nut that can be used to add a touch of sweetness and crunch to a variety of dishes.