I don't think the flower on the other side should be interpreted as "pure" China flower language in this dream. The flower on the other side, red in color but poisonous, is called the flower of hell. It is beautiful and shocking, but it is an extreme feeling. Flowers bloom on the other side of the dead tree, which means a kind of crazy aestheticism bred by sad mood, just like dying with the enemy because of revenge, or like the double suicide of cherry blossoms.
So this dream may mean that your mood is not so happy. Your lonely and empty life is like a dead tree, in which you have a fierce aesthetic fantasy.