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Hey everyone,
I need a help with my young European elm tree. It has completely stopped growing after it got infested with both aphids and scale insects which have been eradicated successfully but it still doesn't show any signs of new growth and some of its leaves even started to colour?yellow. I'm getting desperate as it's late may?already and the plant still looks the same it did in march. I did fertilise it some two or three weeks ago and I try to not overwater it as it hasn't got enough leaves for evaporation. Is there anything I can do to save the tree? Thanks for your suggestions.?

Is repotting even in question this late in the season? Maybe just put it in a bigger container without disrupting the root system. Put it in the shade??

Really have no idea. Have the tree for seven years from a tiny little seedling and never had a problem.?

I has suffered with the infestation. Do not add fertiliser, it will not help. I don't like the look of the surface, that grey mould or whatever needs to be removed. I think it should be ok, you just have to be patient and give it time. If the soil is draining well then fine if not I would scrape about 10mm off the surface, this will give you an idea if it is too wet. Then get a screwdriver or similar and make some holes in the soil down as far as you can this will help with drainage. You may not see any new growth this year as it is a one flush species and it has already flushed once.

Thank you so much for you reply! I didn't realise it's a one flush species. It did have second growth after pruning in previous years tho so really hope it could send new shoots after it regenerates. The substrate is draining well even though it's not ideal.
About the mould thing I know it does look pretty bad in the pictures above but it's actually a type of moss.