I highly recommend The Language of Flowers by Vanessa Diffenbaugh.
I wasn't hesitant to read this book because I thought it was going to be, well, too flowery. I generally like books with a little more action/grit. But, it wasn't at all what I expected. The story revolves around a young woman, Victoria, who has grown up in foster care and group homes. It begins on her 18th birthday as she has aged out of the system and is going to have to sink or swim in the world with very little assistance except for a short stay in a half way house. Through one of her stays in a foster home when she was a young girl, she learned to express her emotions through the language of flowers. The story weaves back and forth through her childhood to present day from chapter to chapter, but it all comes together in the end, and it gives you a very good understanding of how Victoria learned to cope.