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  • From: William McNam <>
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  • Subject: Re: [nafex] solution for fruit drop in oriental persimmons?
  • Date: Sun, 29 Jul 2012 15:08:24 -0700 (PDT)

Thanks for sharing this.
Trees have not received too much nitrogen...
but soil ph may be too high ( thereby making boron unavailable)
Have to check.

On Sun, Jul 29, 2012 8:18 AM PDT Kieran &/or Donna wrote:

>William, I agree with the too much N problem, which supposedly causes
>figs to drop fruit. But I wonder what the chances are that you have a
>boron deficiency? It sure will cause citrus to drop! Southern red and
>yellow clays are generally B deficient, and if you bring up pH and
>organic matter, the B that is there becomes less available. You could
>do a CEC soil test, or try planting beets and turnips under your trees
>to see if they grow well. Beets just won't grow at all with low Boron,
>and turnips will have hollow black hearts. I've been using borax on the
>soil, sprinkling it like fairy dust. But what I OUGHT to be doing is
>spraying with Solubor. I just don't like the price, and have thought
>I'd never use up a 30 lb bag, but just found a friend bought the stuff
>to use on their soil. They used theirs all up and would like more, so
>maybe we'll split a bag. I didn't know I could just buy it at the
>Farmers Coop, thought I had to mail order it or go to McMinnville to the
>big nursery suppliers.
> When I got my husband to take some borax around and talk to my
>trees, he said the apples really wanted it, the persimmons didn't care,
>and the walnut positively cringed. With the walnut he got an image of
>sap running and oozing. I never tell him what I know already when I ask
>him to talk to plants for me, so he didn't know that apples love boron
>and walnuts hate it. Walnuts are very sappy trees, almost impossible to
>graft because the sap pressure will push the cuts ends apart. The
>persimmon he talked to is in soil that hasn't had a lot of change from
>the original clay. That's probably why it hardly crops, not like the
>tree I grafted it from, which was right where a farmer parks his round
>bales of hay every year. Were I to up pH and organic matter there, it
>might want boron too. He's told me since that there's something it
>wants, but he couldn't figure out what it was. Donna
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