I have this baby Japanese black pine which I am growing from seed. It is about 15months old, and I am a total beginner with bonsais. Can you help me please, its needles are turning yellow. I understand that it is natural for pines to shed needles, what is worrying me though is that the needles that have dried out are the most recent ones, the ones at the tip of the plant. The mid-part of the pine looks ok I think
I attach a few photos. They were taken with 3 days difference from Sat 19 Sep to Tue 22 Sep. Is this normal, do you see anything wrong please? Any help highly appreciated!
Any other suggestions you might have (like repotting, prunning, etc) please feel free.