Picking flowers is traditionally read as gathering joy and beauty while it lasts, or choosing something for someone you care about. Older dream books also tie it to youthful romance.
Has this come up in your dreams before? What was going on in your life then?
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.