Walnut tree question

djastram · 28th October 2007, 12:40 PM

Hi.

Last year we moved to a new place, and the new place has a huge black walnut tree. About this time last year, it was dropping nuts like crazy.

This year, their are no nuts at all.

Do walnut trees alternate years? Anybody know?

Dave.

Ekka · 28th October 2007, 02:01 PM

Hi

I found this as a persons experience however they could have that experience due to them not knowing what is going on.

Yahoo! Answers - Walnut tree did not produce walnuts?

What I also found out was that pollination affects crop yield.

Too much is as bad as not enough.

Quote:

Too much pollen reduces the set on walnut by causing pistillate flower abscission (PFA). Some varieties (e.g., Serr) are more susceptible to PFA than others. It has been conclusively demonstrated that if too much walnut pollen is available, pistillate flowers can abscise. This phenomenon puzzled California researchers for years because emphasis was always placed on the importance of maximizing pollination for walnuts (and most other tree crops).

Acotanc-2001 Paper -- Traynor: Tree Crop Pollination in California

--------------------

Quote:

When grown for nuts care must be taken to select cultivars that are compatible for pollination purposes, although some cultivars are marketed as "self fertile" they will generally fruit better with a different pollination partner.

Walnut - Wikipedia, the free encyclopedia

Hope this helps.

treeseer · 4th November 2007, 02:12 AM

Yes all nut-bearing trees can havelight and heavy years due to temps at flowering times and other factors we can only guess at.

28th October 2007, 12:40 PM	#1 (permalink)
djastram I'm new here so be nice Join Date: Oct 2007 Location: Dell Rapids, SD USA Posts: 1	Walnut tree question Hi. Last year we moved to a new place, and the new place has a huge black walnut tree. About this time last year, it was dropping nuts like crazy. This year, their are no nuts at all. Do walnut trees alternate years? Anybody know? Dave.

4th November 2007, 02:12 AM	#3 (permalink)
treeseer Over mature heritage tree Join Date: Jul 2007 Location: SE USA Posts: 536	Re: Walnut tree question Yes all nut-bearing trees can havelight and heavy years due to temps at flowering times and other factors we can only guess at. __________________ Guy Meilleur \| Forensic Arborist \| Better Tree Care

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