There are a lot of stereotypes about tree maintenance from Middle Ages, which are opposite to the modern science. I study biology with Cambridge University books for the last 5 years. I read the best american books about tree pruning - Alex Shigo, Edward Gilmann. I have cases of saving dying trees without any chemicals or fertilizer.
I use only professional high quality japan tools: Okatsune, Makita, ARS, Hanakumagawa.
If you want beautiful, healthy and safe garden, I can help you.
I speak English, Ukrainian, Russian, Polish. I live in Cluj-Napoca, but ready to drive to any other city for interesting project.