A palm tree is read as rest, warmth and escape from the everyday. In older symbolism it is also a sign of victory and peace after effort.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.