So many possible factors. How big is the tree? Is it root-bound? Is it growing inside or outside? How often are you watering it? I've found that...
Just like Brazilian Cherry isn't a cherry tree. When the Europeans discovered new species, they often named then after those they were familiar...
maybe it could help a bit similar old thread on uk forum...
I sent them a request, too.
I would recommend you have a layer of sand on top of your polystyrene sheet first before you lay the cable, then cover with more sand. I have used...