trunk rot

My cottonwood appears to be fed by just part of the trunk, which looks mostly dead at this point. Admittedly, I had only been looking at the opposite side of the trunk for a long time and missed this development, another learning experience.... but now I think it might need some special care to...

Hi! I’ve had this focus for over a year. I took it to a garden place to get it repotted and since then, it has begun to worsen. The person who repotted it placed it in this pot but with compact houseplant soil. I, who know nothing about plants, thought it was perfect. But after doing research, I...