Walnuts are generally preserved for about one year, and the deterioration of walnuts after one year may be very large, so it is not recommended to eat walnuts after three years. Walnuts are rich in oil. If it is stored for three years, it will probably lead to bad taste and most of its nutritional value will be lost. If stored improperly, it may also lead to the pulp being eaten by insects, dull color, bad taste and so on. And some harmful substances will spread into walnut kernel, which is also harmful to human body. So it is best not to eat walnuts stored for three years.

2 How to preserve the best walnut with shell The best preservation temperature of walnuts is 1-2 degrees Celsius, generally not more than 8 degrees Celsius. The best way to preserve walnuts with shells at home is to put them in the refrigerator, but to keep them dry, this way can be preserved for about a year. If there are a large number of walnuts and it is not convenient to put them in the refrigerator, they can be stored for a long time after being fully dried, then put them in sacks or cloth bags with good air permeability and put them in a cool and dry place.

Is there a layer of flocculent white hair in walnut to eat?

It is best not to eat a layer of flocculent white hair in walnuts. This kind of white hair may be moldy due to improper storage, and may be caused by walnut being wet. It may also be because the walnut miscarried when it naturally matured, and a small part of the remaining pulp in the walnut has not yet developed into kernels, which is not realized due to the influence of external temperature. So for your own health, you'd better not eat it. It tastes bad.

How to treat walnut expired as fertilizer?

Walnut is an expensive dried fruit on the market. It would be a pity to throw it away, but we can use it as fertilizer when it expires. First grind it into small pieces, then put it in the soil, cover it with a layer of soil and let it stand for a while. Occasionally, it will gradually become a good natural fertilizer, which can make plants survive better and will not lead to root rot.