Author Topic: JBP - Pollen cones every year.  (Read 2323 times)

scottroxburgh

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JBP - Pollen cones every year.
« on: June 18, 2013, 06:28 AM »
I have a Japanese Black Pine that is from 1974 seed, pot culture all its life.

The two years that I have had it, it is has always grown really fat buds that open into pollen cones in winter, flowering in spring.

I have repotted it into Boon mix over two sessions, as it was weak when I bought it. It has been fertilised heavily with organics, and fish emulsion weekly for the two years, but has not been fully decandled as I have been told that the pollen cones can be a sign of a weak tree.

The few really strong branches that I have decandled do not have the pollen cones forming.

Are pollen cones a sign of tree weakness (health)?

Should I decandle this year even though it is growing the pollen cones?

Do I need to fertilise more/less?

Any other suggestions?

A link to the tree two years ago:
http://aijoubonsai.wordpress.com/2011/09/27/newly-adopted/

I'll get some updated pics and upload.
 

pwk5017

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Re: JBP - Pollen cones every year.
« Reply #1 on: June 18, 2013, 08:47 PM »
I routinely have pollen cones on my developing trees.  They put out 20" candles, so I wouldnt exactly call them "weak".  Trees reproduce. If only weak trees reproduced in nature, we would have shabby and sickly forests.  Get what im saying?  Weakness is a sign of weakness, not reproduction.  Take a pic of your spring candles. If the photos on your site are of the spring growth, then i would say that tree is weak. I see no spring growth.
 

scottroxburgh

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Re: JBP - Pollen cones every year.
« Reply #2 on: June 18, 2013, 09:58 PM »
Keeping in mind I am in Australia, so it is winter now.

The pics on the site are the tree on acquisition, below are ones from this morning.

Thanks

 

scottroxburgh

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Re: JBP - Pollen cones every year.
« Reply #3 on: June 18, 2013, 10:14 PM »
two more
 

Herman

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Re: JBP - Pollen cones every year.
« Reply #4 on: July 11, 2013, 12:49 AM »
Hi Scott

No i wouldn't say your tree is weak. but it doesnt look extremely vigorous either(buds look as short as the ones on one of my jbp that I really tortured last season)... our winters correspond for the most part so i'd say, see how it goes...if the candles are short by de-candling time why de-candle, and of course if the tree looks too weak to be de-candled. The fact that this is the "recovery year" after being repotted the past two seasons and that it was weak when you got it, maybe leave it be and only feed the crap out of it?


Herman
 

Adair M

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Re: JBP - Pollen cones every year.
« Reply #5 on: July 11, 2013, 08:55 AM »
My JBP produce pollen cones, and I decandle every year.

Assuming you have a strong, healthy tree:

The reasons to decandle are to build ramification (more twigs), it also produces shorter needles, and it stimulates back budding on old wood.

For more on decandling, see Jonas's blog at www.bonsaitonight.com.  He published several articles over the past couple of months explaining everything.
 

Herman

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Re: JBP - Pollen cones every year.
« Reply #6 on: July 12, 2013, 12:34 AM »
i've read Jonas' blog and the new articles on black pine and im really impressed by how comprehensive it is....really easy to read and understand

Scott a good test of how strong your tree is will be to wait for the candles to start extending in spring...if they are longer than 6cm by middle spring, id say its safe to de-candle ?

maybe you should read jonas' article on how to select a tree for decandling ?

good luck mate

Herman
 

scottroxburgh

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Re: JBP - Pollen cones every year.
« Reply #7 on: July 14, 2013, 06:50 AM »
Thanks Herman and Adair.

The candles haven't ever been "really strong" so I guess Ill see how it goes this year.

I'll take another look at Jonas' post on the topic.

Thanks guys, I'll try to remember to update come Spring and Summer.