Post repotting issues on a nursery pine

Bonsai_Luc

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Hello bonsai people!

I’m having some dieback issues with a Pinus Sylvestris Watereri. I’ve purchased this pine on March from a local nursery. I’ve repotted it shortly after that in a training container, with a 1:1:1 substrate composition. The tree was kept in shade and from wind protection for the first 3 weeks. I kept the tree misted on the foliage during this period of time. After that I transition it in a more lighted location (still partial shade) it got little sun in the morning, wind protection still, and I stopped the misting. For the last weeks we’ve got rainy and cloudy weather so we didn’t get intense sun. Right now is still in a protected aria (is not outside). I’ve notice diebacks on weak branches, and on the low branches also. When I purchased it, it had a little dieback on one branch, but I wasn’t very concerned about it (now it died a little more), because it got plenty of healthy foliage, like 3, 4 or 5 candles per shoot and interior back budding. The roots were healthy, I’ve cut a portion of them, but not very hard, just to encourage new growth and I didn’t bare-root the tree. I’ve kept a portion of the nursery soil intact. So my question is this, is the tree going to thrive? Or it will slowly going to die? What to do in this situation?

Tnx!
Lucian
 

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Bonsai_Luc

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Put it back outside before you baby it to death! ;)
So no special after care? Those green little needles from the candle sheath are not green anymore :(! How do I know if is still alive?
 

Brian Van Fleet

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The damage is already done. Pines need to be outside and you cannot compensate for that need inside for very long. It looks like it may have been allowed to get too dry over a period of time. Set it outside, water it before the soil is dry, and don’t move it around. It needs to sit still and stable so the roots have a chance. It doesn’t look very promising.
 

Wires_Guy_wires

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The waterii cultivar can handle a lot of abuse and this one doesn't look dead. I did a repot and a serious chop in the same week and it has been thriving without hesitation.
But it does need to be outside all the time, preferably in full sun. Just water more often.
 

Bonsai_Luc

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Thank you all for the quick feedbacks! So I live in the city and I have little space, but still trying to grow outdoor trees :), all my fresh repotted trees stays in a airy and lighted balcony. After this recovering process, I put them outside. I'm a beginner in the bonsai world, but I know that pines likes to stay in full sun (healthy pines). All my trees that were repotted this spring are doing ok, they are showing new growth and seems to be recovered from the repotting process. I also purchased two mugo pines from the same place, I've done the same repotting routine and they are doing great, they extend the needles from the candles and they are rocking it outside. My initial thought about this tree was that this pine didn't recovered from the repotting process and something went wrong with it and that the sun has dried out needles and branches. The watering schedule for this pine is the same as my other pines. The indication of the sustrate, but also being aware that this pine has nursery soil around is root ball at the base, that is not drying out that quick as the substrate. The photos attached where taken one week ago and the indication of the new green growth around the candles was a little hope for me, but now it seems that is going down a little more.
 
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Bonsai Nut

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You have to be really careful with your conifers when you repot. They do not like their roots to be cut. Other trees (particularly deciduous) you can trim the roots back to almost nothing during a repot and they will spring back, but if you cut off roots on a conifer, you may simply find that parts of the tree die. This is apparent if, after you repot, parts of the tree continue to look green and healthy, and parts of it are dying/dead.

If I had to guess, your tree is responding, not to stress from repotting, but to roots being cut(?) Did you trim the roots back?
 

Adair M

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Pines need full sun. Even after repotting. It’s a mistake to put them in shade.

You see, sunlight is their “food”. Or, at least, it’s their energy source for making food. No sun, no photosynthesis. Without that, they starve.

If you potted it in well draining inorganic soil, you can’t overwater it. It doesn’t hold water, so the best practice is to water throughly, and often.

No need to mist a pine.

Will it recover? Maybe. Best chance: put it in full sun. Water often.
 
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