Our black walnut tree is 45 years old. This is the first year since it...

Asked September 21, 2014, 6:36 PM EDT

Our black walnut tree is 45 years old. This is the first year since it started to produce walnuts that it produced none. The squirrels have always cleaned them up but we have always seen them and heard them bounce off the roof. Not this year. It appears to be healthy otherwise. What is happening? Thank you! Jan Pray

Douglas County Minnesota

1 Response

Many trees suffered from late spring freezes that damaged flower buds just as they were breaking dormancy. "Black walnut trees produce nuts in six, seven, and eight year cycles. It's impossible to know which cycle the trees are in, but it can be observed that about 7-8 years following a peak year a given tree will have relatively poor nut production, well below its normal average."
http://www.nemahaweb.com/blackwalnuts/trees.htm