Ah, I see the problem. You need more trees!
I just glanced through the maple thread. The photos in your first post are classic chlorosis in my opinion. Which can be caused by a variety of things...soil being too wet, improper fertilization, etc. Could be iron deficiency or some other trace element imbalance...they can be hard to sort out because symptoms overlap.
Did the leaves look like that when you got the tree? Are only the new leaves like that, or did older leaves which looked healthy, become discolored like that over time? I've had the same kind of thing happen to some trees. If you have not repotted the tree, you should check with the person who sold it to you and find out what they were using regarding fertilizer. Sorry if this is duplication from the maple thread, but I don't have time right now to read every post in detail.
Edit to add - can you tell us the composition of whatever fertilizer you've been using? The package should list the % of each ingredient (nitrogen, potassium, phosphorus, and trace elements...also what form is the nitrogen...urea, ammonium, nitrate).
Indeed I do. I plan to. Just want to get through this winter first, then spring I'll be doing stuff! Lots of stuff. I hope.
I'd love to discuss it, as long as people don't get annoyed with the off topic discussion.
I took frequent pictures of it when I got it, up to a month or so then gave up (I had a plan for all the pics but gave up). I just looked through the pics and from what I can see, none of them have any markings of the scorch like it has it now so I'd maybe go so far as to say it didn't come with these problems, which is worrying! I will check tomorrow, on it to see if I can identify whether it is just new growth doing it, or if it is affecting the existing growth. Thats a very good point, logical thinking, I like that thank you
. Will confirm tomorrow on that one.
It is from Kaizen bonsai, Graham Potter. I spoke to him about repotting and he said it has been in the pot 2 years, will be fine to repot in spring, which I plan on doing. He is a reputable dealer, whom many know so I trust his care of it. I don't know what fertiliser he used, that is something I could ask him. Although they advertise their own fertiliser mix, pellets, so I would assume it's that, but I can ask.
The one thing I have not been doing correctly, which may have caused all of this is watering and fert when I got it, my first tree is a lot smaller and in a smaller pot with different soil mix and I think I've been misjudging the amount of water to give the maple so not been giving it enough. Also only just started to fertilise it 3-4 days ago, and I've had it for 4 weeks now.
And finally I've been using Chrysal bonsai food, liquid fert. It's 4,6,6.
4% - Nitrogen, (2% nitric, 2% ammonical)
6% - water soluble phosphorus, pentoxide
6% - water soluble potassium, oxide
Trace of boron, copper, iron, manganese, molybdenum, zinc.
I hope that means a lot more to you than me! I've read up about the NPK, and what each of those elements do, but past that, not so much.
This is the fert I was given with my Chinese elm, which was a mallsai, so I've little confidence in it being a very good or suitable fert, but it is something until I put in place a better strategy.
Feel free to PM instead, if you'd prefer by the way. Appreciate your time and effort with your posts