Phrase(s): blossom into something
1. Lit. [for a plant] to develop into full bloom. • The bush blossomed into beautiful red roses. • Imagine this brown old bulb blossoming into a lovely flower. 2. Fig. [for someone or a concept] to develop into something. • She blossomed into a lovely young lady. • The idea blossomed into a huge real estate development.
McGrawhill's American Idioms And Phrasal Verbs
Also, blossom out. Develop, flourish, as in She's blossomed into a fine young woman, or His business has blossomed out and he's doing well. [Second half of 1800s]
American Heritage Idioms