Hello guys,
I planted a willow sapling four months ago, It was approximately four meters high!
I used to water that willow once in two days. last month it started to lose leaves and it lost them all by previous week. after cutting the sapling from the middle I noticed a strange black greasy like material under it's skin. I took some photos and I am going to attach the photos to my thread.
Do you have any Idea of what is that greasy like substance? It is exactly beneath the parts which the skin layer has got loose and changed in color.
Thanks for your responses in advance,
Alireza