Yamadori Larix Laricina - 1st Repot

Lifaholic

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Hello everyone! I hope you're all doing well, staying healthy and staying busy with your trees.

I had to repot a larch my better half (@f1pt4) collected in 2016, which I unfortunately let go a little too long in its pot.
The roots were growing around the pot and I had to do a bit of work to get them in check.
Fortunately, the tap root was already cut fairly short during the collection process, so I didn't have to remove too much of it.

Here's a bit of the process I went through one warmer evening in the garage. I appreciate your thoughts and ideas...

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The larch when it was first collected in 2016. A cute wee tree :)


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Two views of the nebari. Obviously overgrown.


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Obviously overgrown, but it had a lot of healthy roots.
Kids, don't let your trees get to this point! haha



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I used a chopstick to delicately, but sometimes firmly untangle the roots.
A lot of them were growing around the pot; some were growing in towards the tap root, others were criss-crossing all over the place.
I chopped away the thick ones that had no fine roots growing from them, those growing from the bottom of the mass, including reducing what was left of the tap root (not much at all).



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This is the amount of soil and roots that came off during the mutiny. The roots and rocks were separated from the soil, which will be reused for trees collected in the future.
(Yes, those are Nutella buckets!!!)



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I had several pots to choose from, but the roots dictated an oblong, shallow-ish pot, as I wanted to make sure it fit the root ball.
The tree is firmly wired in to minimize movement in the pot. The stick in the pot is actually a spare piece of 6mm aluminium wire, which is wedged firmly between two walls of the pot.
It holds down a few key stray roots that want to pop up too much, but I didn't have a way to wire them in securely without damaging other roots.
For the soil mix, I used large pumice as a drainage layer, while mixing 1/1/1 1/8" pumice, lava and peat.



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Since I removed so many roots, I decided to balance things out on the top by pruning back to some structural branches.
To finish, I sprinkled some more small peat particles on top of the soil and covered it with sphagnum moss to help it retain more moisture.

The tree is planted a little too high in the pot, in my opinion, but since it's not the final pot, so I'm ok with it.
It should also be off-centre towards the right, but the roots on the right are a little too lanky to chop them shorter at this point in time.
I'll address the placement in the next repot, when the rootmass is a little more developed on all sides.

From start to finish, this was a relaxed 1.5 hr process and the tree is now recovering in a grow box so it doesn't freeze in the next couple of nights.
Can't wait to see what you all post! :)
 
Can’t wait to see if it survives.
Me too. But in all honesty, I've done reports like this one before and they've all done mostly well before. The rest of the year will all be about recovery. There will be no more pruning or wiring done to it. And next year, I will also keep any work on it minimal as to give it time to build that new root mass.
 
I am interested since I have a bunch of American and Japanese larch seedlings being developed for forests and as individuals and they all will need root pruning for that. Need to see how far I can go when the time comes.
 
Wow, big time root reduction.
CW
A lot of the roots were very long and were winding around the pot. Most of them only had tufts of finer roots at the very tips, and a few closer to the nebari, so there really wasn't much in between. I should've taken some photos of what I cut away. I won't be doing anything else to this tree this year, and be quite conservative with it next year as well, to ensure it has time to recover. :)
 
A lot of the roots were very long and were winding around the pot. Most of them only had tufts of finer roots at the very tips, and a few closer to the nebari, so there really wasn't much in between
I understand. Just had the same problem with a juniper. Cut them all or keep them all. There's really no in-between.
CW
 
Great work to reign in the crazy larch growth! I really do enjoy smaller larch compositions, and this one is on a good path. Our local prebonsai grower has taken a deep dive into really fantastic small size larch.
 
Welcome to Crazy!

That's a lotta Nutella!

Sorce
 
Fwiw. This larch has been growing extremely well. Very vigorous grower. I'm not overly concerned about the amount of folliage and root mass cut back. All of these larches get fed and watered very well, and the peat/lava/pumice mixture seem to keep them quite happy as well. I'm looking forward to seeing this one develop.

Personally it's taken me quite a number of years to understand growth habits of the various trees in our garden, let alone being brave with making major (hopefully smart) pruning decisions. I encouraged OP to be brave with this one as to set a proper structure for the tree, as opposed to continuing being overly cautious with it.

Yes there's a time and place for caution as well as being brave with chops for every tree. One of the skills is to know when the tree is ready for some decisive pruning. Judging by its relatively strong and unrestricted growth over the past couple of seasons the decision was made to go to town on it.

It is sitting in a protected cold frame for the moment, riding out this last cold snap of the year hopefully, pretty comfortably.
 
Fwiw. This larch has been growing extremely well. Very vigorous grower. I'm not overly concerned about the amount of folliage and root mass cut back. All of these larches get fed and watered very well, and the peat/lava/pumice mixture seem to keep them quite happy as well. I'm looking forward to seeing this one develop.

Personally it's taken me quite a number of years to understand growth habits of the various trees in our garden, let alone being brave with making major (hopefully smart) pruning decisions. I encouraged OP to be brave with this one as to set a proper structure for the tree, as opposed to continuing being overly cautious with it.

Yes there's a time and place for caution as well as being brave with chops for every tree. One of the skills is to know when the tree is ready for some decisive pruning. Judging by its relatively strong and unrestricted growth over the past couple of seasons the decision was made to go to town on it.

It is sitting in a protected cold frame for the moment, riding out this last cold snap of the year hopefully, pretty comfortably.

Very well said! During the winter repotting season here I was discussing just that with my local expert grower(Yves L.) He talked about exactly the same points you did, and how often people balk at doing the work early enough in the trees progression. Often to find themselves worse off in the long run, as they have roots that never work into an ideal design. Even watching more Mirai well I sit at home, Ryan clearly has the confidence to go at his rough stock.
 
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