A tree in a dream often represents stability and the roots of your identity -- how grounded you feel, and how much you've grown from where you started. A tree with deep, visible roots can reflect a strong sense of self, while one that's uprooted or withering may point to identity that feels shaken or under-nourished right now.
The Superior Planets are most efficacious; the inferiour are weak, and easily do suffer by the Superiours, and receive good or ill from them. - William Lilly (1602.-1681.)