Argh, I'm so frustrated. I'm sure I put too much Miracle Gro in the soil. It wasn't a solution, it was in dry form and I mixed it into the soil. It's slow release and it releases nutrients for months. So I guess my only option now is to remove the soil from around the plant and put new, without the fertiliser. That will be a second shock for the little tree within just 5 days. I hope it will survive
Thank you very much Olaf