Reducing branch junctions during development

You have tons of talented and experienced bonsai people around you in the San Francisco bay area. If you're unsure of how to handle this tree, take it to a club meeting or workshop and have an experienced person work it with you. You'll get much better advice than any of us can provide from pictures.
 
@BrianBay9 Gave you great advice.
Get some experienced, in person help with this tree if you are unsure about the best way to handle it. You'll be glad you did.
 
I would not do this all over at this stage.
You desperately need buds closer to the trunk and main branches. Those 3 year needles can give that at this time of year. I prune branches back to the oldest healthy needles. That will usually force buds from those needles. If you are lucky maybe some on older bare parts too but almost certain where there are needles.
If those oldest/lowest needles are plucked now I find it reduces budding to the needles you have left on when the branches are pruned.
You can remove some older needles in areas where there's no need for new buds. That will allow more light and should concentrate buds in the areas you need them most.
Hello Shibui. This cutting back at old needles verses cutting back at already present buds caught my eye. Does this work on other pines like lodgepole, ponderosa etc or just JBP?
 
Hello Shibui. This cutting back at old needles verses cutting back at already present buds caught my eye. Does this work on other pines like lodgepole, ponderosa etc or just JBP?

I don't know if it works with other species but I will say it is a risky move even with JBP in that it is not guaranteed to work. That is despite the fact that JBP are more agreeable to back budding than many other species. I don't know how amenable ponderosa and lodgepole are to back budding. The species I would be most comfortable trying this on would be pitch pine and mugo.

Removing all buds can kill the branch if the tree decides it won't form new buds at those old needles. The tree can just decide to divert energy to branches that have buds especially if they are higher up than the branch you are trying this on.

If one is going to attempt this, it is highly recommended to feed the tree heavily the year before and get it very strong and vigorous.
 
Hello Shibui. This cutting back at old needles verses cutting back at already present buds caught my eye. Does this work on other pines like lodgepole, ponderosa etc or just JBP?
Cutting back into a section with healthy needles is often done to promote back budding within the interior of branches. Particularly with those species that do not have multi flush tendencies. But it is always safer to cut back to an existing side shoot or existing bud. It is even safer to ut back to a side shoot or bud that has had at least one full growing season to establish itself. The devil is in the details. That is the problem with a general question. It depends. When the grower knows the tree and its condition, the options vary for methods.
Knowledgeable growers will back off when certain terms are used. ( Old needles )
Not complaining, just pointing out the difficulty with terms that can easily be misinterpreted. For me old needles refers to any other healthy needles still on the tree besides the current years new growth.
 
I don't know if it works with other species but I will say it is a risky move even with JBP in that it is not guaranteed to work. That is despite the fact that JBP are more agreeable to back budding than many other species. I don't know how amenable ponderosa and lodgepole are to back budding. The species I would be most comfortable trying this on would be pitch pine and mugo.

Removing all buds can kill the branch if the tree decides it won't form new buds at those old needles. The tree can just decide to divert energy to branches that have buds especially if they are higher up than the branch you are trying this on.

If one is going to attempt this, it is highly recommended to feed the tree heavily the year before and get it very strong and vigorous.
In your personnal experience what is the probability to kill the branch on a JBP after removing all buds and cutting back to old needles and leaving, for example 10 pairs of old needles ? 0.1% ; 1% ; 10% ; 50% ?

I ask this question because, the way you describe it, i have the feeling it is a risky operation. On healthy JBP, we often remove all the candles in summer to get a new growth with new buds (mekiri) .

My2cents : As far as i remember, in my experience with my JBP , with my scotts pines and my JRP, cutting back to old needles never killed a branch. Or maybe the branch was so thin, weak and in the shade, that i don't even remember it died because there was no consequence on the tree's appearance.
 
Hello Shibui. This cutting back at old needles verses cutting back at already present buds caught my eye. Does this work on other pines like lodgepole, ponderosa etc or just JBP?
Pines are not native down here so, even for bonsai, we have very few to work with which means my direct experience is with JBP and JRP, one single mugho and a few younger JWPs that I still have little experience with so I can't tell you how other species react.

Removing all buds can kill the branch if the tree decides it won't form new buds at those old needles. The tree can just decide to divert energy to branches that have buds especially if they are higher up than the branch you are trying this on.
This observation is a very good one. My apologies for not pointing this out initially. Cutting back hard needs to be done on all branches at the same time. Be VERY careful leaving younger growing tips above a hard cut back as most trees will direct any energy to maintain existing growing points. I guess new buds need more effort so seem to be a second choice for most trees.
Note that this applies to most deciduous species as well as pines.

Just to show I have used this technique here are some pictures.
This field grown JBP has great bends down low but all current growth way out on the ends of long branches. Most strength at the end of a large sacrifice trunk without taper or movement. These branches were ALL chopped back to oldest needles last winter here.
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The results: Plenty of new shoots emerging from older needles.
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Next tree is much taller with less bends and interest in the trunk. Also probably not as vigorous as the previous tree. Also chopped back to oldest remaining needles last winter.
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Results are not as spectacular. Enough new shoots on the branches to at least start work with and there's still hope for more through the rest of our summer.
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A couple of the upper branches have more and stronger new shoots but there is a backup if all else fails - a couple of small shoots direct from the old trunk lower down.
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This one yet to be chopped. I've waited until normal decandling time to chop this one to see if I get a different response to summer chops on JBP.
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In your personnal experience what is the probability to kill the branch on a JBP after removing all buds and cutting back to old needles and leaving, for example 10 pairs of old needles ? 0.1% ; 1% ; 10% ; 50% ?

I ask this question because, the way you describe it, i have the feeling it is a risky operation. On healthy JBP, we often remove all the candles in summer to get a new growth with new buds (mekiri) .

My2cents : As far as i remember, in my experience with my JBP , with my scotts pines and my JRP, cutting back to old needles never killed a branch. Or maybe the branch was so thin, weak and in the shade, that i don't even remember it died because there was no consequence on the tree's appearance.
There is a difference between what we do in candle cutting and cutting back a branch into 3 year old needles.

We cut candles on the tips of branches where there is still lots of energy and auxin so the pine doesn't have an issue producing buds again there. Getting buds further back on older wood is harder but it isnt impossible as demonstrated by shuibui's work. Buy cutting back all the branches at once, the tree doesn't have much choice. Form new buds or die. Though I'd be concerned with some of the responses he showed. Some are pretty weak and the branch could still not survive.

As for percentages, you would need to do this on 100s of trees to even be able to venture a guesstimate.

The more healthy and vigorous the tree, chances should be better.
 
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ust to show I have used this technique here are some pictures.
This field grown JBP has great bends down low but all current growth way out on the ends of long branches. Most strength at the end of a large sacrifice trunk without taper or movement. These branches were ALL chopped back to oldest needles last winter here.
Pictures are often needed it seems. Those who develop pines understand this process and do not question it. Those who collect Yamadori pines and need to chase back foliage, understand and use this technique all the time. Here in my nursery the focus is on developing pines and conifers. JBP, JRP, Scots Pine, Shore Pine. Retaining needles in select locations and cutting back into older needles is a standard technique used in combination with other techniques. Many growers put a focus on trunk development and thickening prior to chasing back the foliage to the interior or lower down on the trunk.
Just to show I have used this technique here are some pictures.
We share the same experience. Pictures show several types of pines in various stages of development all have benefited from cut back into older but healthier sections of needles without side shoots in order to create a stronger back budding response closer in to the trunk, or on the trunk itself when sacrifice leader was chopped.
Merry Christmas Pine nuts!
 

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Pictures are often needed it seems. Those who develop pines understand this process and do not question it. Those who collect Yamadori pines and need to chase back foliage, understand and use this technique all the time. Here in my nursery the focus is on developing pines and conifers. JBP, JRP, Scots Pine, Shore Pine. Retaining needles in select locations and cutting back into older needles is a standard technique used in combination with other techniques. Many growers put a focus on trunk development and thickening prior to chasing back the foliage to the interior or lower down on the trunk.

We share the same experience. Pictures show several types of pines in various stages of development all have benefited from cut back into older but healthier sections of needles without side shoots in order to create a stronger back budding response closer in to the trunk, or on the trunk itself when sacrifice leader was chopped.
Merry Christmas Pine nuts!

I have not done this to very many pines so I didnt feel that I could give a good answer to the question of what percentage of successful outcomes.
How many trees have you cut back into the 3 year old needles on and what percentage have you had success with?
Would you agree that this kind of procedure is most successful on a strong and vigorous tree?
 
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I have a question regarding timing of this operation (cutting back to old needles). Heard winter, time of decandling… what else? I saw somewhere a post (think it was from @Shibui ) when he pointed out all possible times for the hard cuts with different types of responses. Silly me didn’t get it marked and can’t find it now.
 
I have not done this to very many pines so I didnt feel that I could give a good answer to the question of what percentage of successful outcomes.
How many trees have you cut back into the 3 year old needles on and what percentage have you had success with?
Would you agree that this kind of procedure is most successful on a strong and vigorous tree?
Oh Ye of little faith!. I have not kept count of the number of trees. I have developed over 750 JBP for sure. Fewer JRP and other varieties of pine. For a rough estimate approximately a thousand. Those are from seed, not counting developing more mature pines from other growers or collected trees of indeterminate age. The only thing I can state for sure is that I have not lost a branch as a result of this technique. That being said it is very important that trees be healthy and vigorous if you wish to apply Bonsai techniques with success. Just performing the correct technique at the right time is only part of the process. I definitely agree that the successful use of technique depends on strong, healthy vigorous trees.

Here is what I mean by a healthy response to cutback.
This is a 12 year old JBP from seed that I was working on today. There was a lot more foliage and branching before I began work. I am working my way through a group of 64 of similar stage at this time. The branches are as the result of bud back, not the original first whorl, except the apical leader which has been changed three times! The side branches are developing through bud back and cutting back into old needles. If you look closely at the trunk where it was chopped the second time you can see new buds on twelve year old wood, they are very small at this stage but they will provide branching in previously bare areas as the tree develops. Within five years the tree will have all the branches required for design. At this point there is a rough structure, decent nebari, movement in the lower portion of the trunk and taper developing in the upper portion. These pictures just show part of the development process. Even the beginning stages of refinement are ten years away!
Also important is the protection of new buds at this stage, so depending on climate one needs to provide proper care to preserve the health of the tree. If the new buds form late then extra care may be needed. Not all these new buds will be used, When the stub is carved back they will be thinned out appropriately for position. The stub will be retained until the new buds are stronger. in short the tree must be healthy and the process must respect the trees health with appropriate timing. Hope the comments and pictures help.
 

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I have a question regarding timing of this operation (cutting back to old needles). Heard winter, time of decandling… what else? I saw somewhere a post (think it was from @Shibui ) when he pointed out all possible times for the hard cuts with different types of responses. Silly me didn’t get it marked and can’t find it now.
The most common time is late fall/early winter, Often done just prior to bud swell in the spring. I prefer the first because it gives more time for bud formation and stronger new growth before winter. Because trees vary in response one needs to be prepared and adapt the timing and aftercare for trees and ultimately the development timing branch to branch on the same tree. They do not read memos with respect to following a schedule in my experience. Also keep in mind your climate and growing season. Beest to follow practices and advice from those who know and also share the same circumstances.
That being said, if it is trunk reduction from an apical leader I have switched to late spring/early summer. I believe I get a stronger response on the trunk if I time it to be right at the peak of auxin production with spring candles on the apical sacrifice. Basically full extension of the candle with new needles extended outwards. In my neck of the wood this occurs in the beginning of June usually!
 
I should have shown a picture of the condition of a tree I consider healthy! here is the next one up for work today! Twelve years of age, 1/2 way through the development stage. I work my trees at this stage usually twice per year to keep them moving along in development. The growth pattern requires pruning and thinning to keep the interiors healthy and progressing. Note: no concern for length of needles at this point in development, major focus is health and growth for progress.
 

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The most common time is late fall/early winter, Often done just prior to bud swell in the spring. I prefer the first because it gives more time for bud formation and stronger new growth before winter. Because trees vary in response one needs to be prepared and adapt the timing and aftercare for trees and ultimately the development timing branch to branch on the same tree. They do not read memos with respect to following a schedule in my experience. Also keep in mind your climate and growing season. Beest to follow practices and advice from those who know and also share the same circumstances.
That being said, if it is trunk reduction from an apical leader I have switched to late spring/early summer. I believe I get a stronger response on the trunk if I time it to be right at the peak of auxin production with spring candles on the apical sacrifice. Basically full extension of the candle with new needles extended outwards. In my neck of the wood this occurs in the beginning of June usually!
Thanks @River's Edge … that’s helpful… I think I missed the early winter window so will try second best option you mentioned. Below is candidate in question… was reported early 2023 so didn’t really want to do anything else but responded very well and currently is holding needles for at least last two growing seasons.
Reading your other posts… quite shocking pines are backbudding from 12 years old wood… that gives me a lot of hope.
 

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I disagree. This is counterproductive during development, JBP can retain needles for four or five years under healthy conditions. JBP create back buds from two sources, adventitious buds and needle buds. Keeping the needles for longer periods of time closer to the trunk, on the interior of branches simply improves the chances of additional back budding. By all means follow the guidelines for thinning, removing bottom downward needles, allowing more light and air in to promote back budding. Wiring the branches out and open with tips down to suppress auxin will all contribute!
Do not confuse directions for refinement techniques with directions for developmental techniques. It is important to keep the stages separate when applying technique.

I would not do this all over at this stage.
You desperately need buds closer to the trunk and main branches. Those 3 year needles can give that at this time of year. I prune branches back to the oldest healthy needles. That will usually force buds from those needles. If you are lucky maybe some on older bare parts too but almost certain where there are needles.
If those oldest/lowest needles are plucked now I find it reduces budding to the needles you have left on when the branches are pruned.
You can remove some older needles in areas where there's no need for new buds. That will allow more light and should concentrate buds in the areas you need them most.
I still need to understand something Shibui...are you saying that if I have a branch on a healthy pine 10" long with a very small live branch at the end of that branch, and no buds anywhere, and I cut off that branch 6" away from the trunk amongst healthy older needles that I could very likely get buds from the end of the branch to the trunk? I'm working with 2 flush Lodgepole and Ponderosa by the way. Thank you for clarifying that.
 
Thanks @River's Edge … that’s helpful… I think I missed the early winter window so will try second best option you mentioned. Below is candidate in question… was reported early 2023 so didn’t really want to do anything else but responded very well and currently is holding needles for at least last two growing seasons.
Reading your other posts… quite shocking pines are backbudding from 12 years old wood… that gives me a lot of hope.
Your tree looks healthy. Always best to let the tree recover after repotting. Maintaining a high level of health is important for best results.
This example is JBP , another 12 year old from seed. Here is what happens when you cut back on a healthy group of old needles and then delay thinning the response. This branch was 3/4" indiameter, cut back to a group of three or four year old needles! Lower branch so not dominant growth pattern, but had been left for a sacrifice branch to thicken base of the trunk somewhat. Pictures from end and side. tweezers to give sense of dimension beyond my description. I should have found the time to thin the new shoots before this! But it does illustrate the response if cutting within a group of healthy needles. Healthy tree, full sun, regular care and proper nutrition. Free draining mix with pumice, lava, akadama and granite grit. Medium size particles all seived and irregular in shape! So even mix of moisture and air.
 

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I still need to understand something Shibui...are you saying that if I have a branch on a healthy pine 10" long with a very small live branch at the end of that branch, and no buds anywhere, and I cut off that branch 6" away from the trunk amongst healthy older needles that I could very likely get buds from the end of the branch to the trunk? I'm working with 2 flush Lodgepole and Ponderosa by the way. Thank you for clarifying that.
August 44 You quoted both Shibui and myself in the same query! Post #37. Just for clarity I am not in disagreement with his explanations.
When I stated, I disagree it was with respect to removing all the three year old needles as mentioned by another party. Not Shibui I am wondering if you have taken something out of context. Or am I misunderstanding your intent of including my statement?
Not sure how many lodgepole pine or ponderosa are in Australia, will leave that for Shibui to respond to.
 
August 44 You quoted both Shibui and myself in the same query! Post #37. Just for clarity I am not in disagreement with his explanations.
When I stated, I disagree it was with respect to removing all the three year old needles as mentioned by another party. Not Shibui I am wondering if you have taken something out of context. Or am I misunderstanding your intent of including my statement?
Not sure how many lodgepole pine or ponderosa are in Australia, will leave that for Shibui to respond to.
Sorry for the confusion Frank, but glad you answered my question. I am somewhat new to this game (5 years) and have always been taught to always cut back at a bud or branch or the limb will die back to the closest bud or branch. I had no idea that one could cut back to healthy needles and expect back budding. Always learning.
 
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