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13-Oct-2006
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#11 |
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bonsaiTALK Master Chief
 
Join Date: Apr-2006
Location: Lakeland - Florida
Country: United States
USDA Zone: 9A
AHS Heat Zone: 11
Posts: 1,004
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Pics helped a lot. That is what mine are doing. I have noticed it on this years needles as well as last years needles. It's very spotty, only a few here and there - is yours like that? I also have some needle cast on a few, just wanted to make sure we were on the same page.
Overall your tree looks fine, plenty healthy. I would not sweat it - someone will have some input. I will research it some more next week, perhaps haul one to my County Extension Agent. Free diagnosis from an expert!
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There is unrest in the Forest
There is trouble with the trees For the maples want more sunlight And the oaks ignore their pleas. |
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Yellowing needles on Japanese Black Pine |
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17-Oct-2006
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#12 |
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bonsaiTALK Neophyte
Join Date: Oct-2006
Country: Singapore
Posts: 8
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Yes, mine is spotty - sort of here and there.
I'm beginning to think it's due to dehydration. Recently, I started watering the plant by pouring water on the soil so that it floods. The water then drains very quickly and I flood the pot again twice, so that I can be sure that the whole pot of soil is well watered. This is probably similar to the method of submerging the whole pot in water until there are no air bubbles. I also thoroughly mist the needles once a day. Since I started doing this new method of watering, the plant has not developed any more spots, and the needles look greener and more plump (if this is possible). One side effect of this is my fertiliser cakes have become seriously mouldy.  Not sure if this would harm the roots. |
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