When is the best time to buy walnuts?

Everyone's standards are different. The quality walnut to be caught must be autumn, when the walnut just leaves the tree. A solar term is said to be after the Millennium. Gregorian calendar September 10 or so. The actual situation is that some varieties were released in August, and some varieties were listed in June +0 1. But when you buy walnuts at that time, walnuts will shrink. It's normal for walnuts that have just planted 43 trees to shrink to 4 1.