Cotoneaster with some yellowing after repot

[maroun.c]

Reported this one 2 weeks ago and getting yellow leaves. Seems to be focused on few branches, do cotoneaster have specific roots feeding specific branches i could have over damaged?
Anything to help it? Been in shade since repot.
Thanks

 

[Hartinez]

Can you give more info or pics of the tree before repot? How much did you reduce the rootball? Was it healthy before? Fresh purchase?

 

[maroun.c]

Purchased dec 2020. Wasn't doing great.

2 weeks back leavs were much more green and tree looked better. Yet soil was clearly an issue so repoted eventhough it was a bit late.

Had a compacted thick mat of roots below the soil in the pot but soil had few roots
Here's how much roots were left


Thanks for any info

 

[Mike Corazzi]

I think cotoneasters were bred to die in pieces.

Now it's the cotoneaster.

NOW what? It's in free draining soil with ample water and seems fine ...........UNTIL........... A stupid END decides to get all shitty and crispy. This is exasperating. :mad: I mean look at all the rest of the foliage. Green, supple, healthy. Uh-oh....here goes another END !! 💩

www.bonsainut.com

 

[Hartinez]

Cotoneaster can take a lot of abuse, but every time I removed too many fiberous roots, I experienced much the same result. You can chop a considerable amount off but you have to leave a healthy mat to push new foliage. Also, it may have been from the get go with it not being in the greatest health to start. Not to say it’s curtains for this tree but it’s got a long road ahead. Def keep the moisture in check. Not too wet, not too dry. If a branch is seemingly dead or about dead, I’d cut it off and leave only the strongest growth. No sense in wasting energy on dying leaves and branches.

 

[Jiminsauga]

Purchased dec 2020. Wasn't doing great.
View attachment 378320
2 weeks back leavs were much more green and tree looked better. Yet soil was clearly an issue so repoted eventhough it was a bit late.
View attachment 378321View attachment 378322
Had a compacted thick mat of roots below the soil in the pot but soil had few roots
Here's how much roots were left
View attachment 378323

Thanks for any info

What soil did you have it in? From that rootball picture it looks like most are black and rotten. May have been kept too wet or maybe the soil broke down and it lacked oxygen. Many possibilities. Best of luck nursing it back to health.

 

[rorror]

I quess the mistake was to repot a tree that is actively growing, incombination with removing to much roots.
The tree looked almost dormant in december, some bit later, just before new growth would have been a great moment to repot.
How is your weather? Hot and sunny? Are you doing aftercare? Humidity dome, or plastic bag? So leaves can take up moist too and not only the roots.
Some top will die, but cotoneasters grow fast, that you have that top back in a year or 2.
For now keep it growing for a year, without any removing of foilage. Let the tree get healty first, before doing any stylings to it.

 

[maroun.c]

What soil did you have it in? From that rootball picture it looks like most are black and rotten. May have been kept too wet or maybe the soil broke down and it lacked oxygen. Many possibilities. Best of luck nursing it back to health.

It was in the nursery soil that it was moved with to a bonsai pot. Bought it as such.
Soil was clogged so took a bit of water to have water go through but also it did stay a bit too wet which was what pushed me to repot it when it showed signs of health.
Thanks

 

[maroun.c]

I quess the mistake was to repot a tree that is actively growing, incombination with removing to much roots.
The tree looked almost dormant in december, some bit later, just before new growth would have been a great moment to repot.
How is your weather? Hot and sunny? Are you doing aftercare? Humidity dome, or plastic bag? So leaves can take up moist too and not only the roots.
Some top will die, but cotoneasters grow fast, that you have that top back in a year or 2.
For now keep it growing for a year, without any removing of foilage. Let the tree get healty first, before doing any stylings to it.

Indeed , unfortunately I couldn't repot before it showed signs of health and bynthe time it showed that it was already growing and soil. was clearly to bad to wait till next year.
It is still late spring but a bit cooler than previous years. Around 25 degrees Celsius in day time and around 20 at night nit dry but still not too humid. Its still in shade in back garden which is a bit more humid since I repoted it.
Not doing any humidity dome nor plastic bag, never done it to any of my trees after repot and honeslty 1st time I hear about it, is it necessary? Yet its a bit humid here and I'm.misting it twice a day. Should I do the humidity cone or bag ?

 

[maroun.c]

Tree looking worse today unfortunately

 

[rorror]

Does not look good. For now i would pluck al the leaves off. So it might build up some pressure to push buds. And put it in a place out of the wind, with only 2o 3 hours of early morning sun, and the rest of the day out of the sun. And hopes it recovers.

Around 25 degrees Celsius in day time and around 20 at night nit dry but still not too humid

So relitively hot, and no low humidity.
Plastic bag, will get the humidty up to 80/90% or highter. at that point leaves can't transpire much water into the air, as the air is already saturated. Leaves will have droplets of water on them, and take back water. Roots can then beter keep up with demand. But also not in full sun at 25c, as that will be a sauna inside. But beter give it only morning sun for a few hours, and later in shade. So the tree can recover and push out new roots.