I have a black walnut tree in my yard... :( which this year produced no walnuts.. :D ....I am not complaining, but for 25 yrs that I have lived here that tree has littered the yard with tons of walnuts.....suddenly this year....no walnuts.....is this tree dying? All other aspects of this tree are normal ...just that the weather this year has been cold and rainyand now that fall is here it is hot and muggy. Did Mother Nature fool my tree this year?

Any help is much appreciated.