In this first box, it shows Lizabeth as a child. She is having fun destroying the "witches" marigolds with the other children.
Get off my property!
In this scene, Lizabeth is listening to her parents discussion about how her father is upset that he isn't doing anything to help their family. She was also in the middle of childhood and adulthood while stomping on Miss Lotties flowers.
In this final scene, Lizabeth had became an adult after stomping on all of the marigolds. She then realized they werent just a bunch of stupid flowers, but they were the last bit of happiness Miss Lottie's happiness.