Kiyohime Mapple help

[adidre]

If you wonder about the tree placement it is indeed on a balcony behind a glass wall. Initially the tree was in the middle on top of a box then I moved on the side where is more shade from the panels.
Anyway it is not getting too much wind but it is open air, and I do not have other place to put it outside.

 

[arbuscula]

Yes that makes sense and I do like the looks of that particular product in the sense it has no Nitrogen or significant presence of salt-based macro-nutrient additives, however that is not true of all seaweed products so just wanted to advise some caution. There are a definitely "seaweed" products that have NPK macros added into them so it is important to choose your soil additives very carefully especially if the issue we are seeing is a result of overfertilizing to the point where the entire substrate is extremely hot (although we don't know for sure if that is actually the case here, but it seems plausible).

I have a liquid fertiliser that is given as 7-7-7... but with added seaweed so I take what you have said on board. However, it's sold as a multipurpose *fertiliser* and not a Seaweed concentrate. I've only experience of using the Seasol product so can't speak about others - a reason I mentioned "Seasol" in my initial comment.

My error for not saying a *liquid seaweed concentrate* to be diluted as per the label instructions... if not possibly half the dosage - or a quarter even! - to start and gradually increase to recommended. Easy to loose track of what you're trying to say in as short a response as possible .

From what the OP stated regarding when he fertilised with a "blue" fertiliser and the tree state at the time of fertilising - re the leaves - I'm making an assumption (something I don't like to do) that the tree was already in a stressed state and using the fertiliser, thinking the tree needed feeding?, the roots being already under pressure, added to the problem. I think it was a case of fertilising at the wrong time.

Looking very closely at the photographs provided, individually, show what appear to be clear (glass?) balcony screens as well as window frames - possibly an indoor/balcony environment... Hence my suggested process to try to help save the tree.

 

[arbuscula]

If you wonder about the tree placement it is indeed on a balcony behind a glass wall. Initially the tree was in the middle on top of a box then I moved on the side where is more shade from the panels.
Anyway it is not getting too much wind but it is open air, and I do not have other place to put it outside.

Thanks for the clarification. I would advise trying to make up some type of frame to attach shade netting to if at all possible. You may also be getting the effect of *reflected heat* from the neighbouring buildings and glass. I sincerely wish you and the tree well and hope you are able to get it to recover. An additional option may be to trim back/remove some of the leaves (partial defoliation) to take some more stress away. If unsure regarding "how" to do partial defoliation i would suggest to Google search it - or search engine of your choice.

 

[adidre]

Hi guys,
This is the current situation after 1 month: all the leaves got dry during the summer and the tree has new leaves now which look healthy but there is still an issue always starting on the top. The rest of leaves look ok for the moment but I hope it will not extend to the rest of the tree. Anyway the cause of this is not clear for me at this moment. the tree is protected from direct sun and watered when soil is dry, about every 1-2 days.

 

[Mailo06]

I have the same problem with my kiyohime, out of 4 years of having it still can’t gage the watering

 

[Deep Sea Diver]

Certainly looks and acts like a root issue. Wondering when the last repot was and if the media matched.

Also where and what twmperature was the tree wintered over.

Cheers
DSD sends

 

[adidre]

Certainly looks and acts like a root issue. Wondering when the last repot was and if the media matched.

Also where and what twmperature was the tree wintered over.

Cheers
DSD sends

The repot was done last year by the bonsai farm where I bought it. The tree was kept during the winter on the same spot on the balcony (Brussels, Belgium) and the temperature was not below -2 Celsius.
I will try a repot next spring.