Isolation and Loneliness: The overgrown and uncared-for garden reflects Mary's initial feelings of isolation and loneliness when she arrives at Misselthwaite Manor. She is cut off from her former life and feels like a stranger in a new place. The neglected garden mirrors her inner state of mind.
Untapped Potential: The garden, despite being neglected, still holds potential for growth and beauty. This represents the idea that even in the midst of difficult circumstances, there is potential for transformation and healing. Just as the garden can be revived, Mary's emotional well-being can be restored through her experiences in the garden.
Transformation: As the story progresses, Mary's interactions with the garden and the other characters lead to a transformation in her outlook and personality. The garden becomes a symbol of this transformation. As Mary tends to the garden and helps it flourish, she experiences personal growth, joy, and a sense of belonging.
Healing and Renewal: The garden becomes a metaphor for emotional healing and renewal. Through her connection with the garden and her relationships with Dickon and Colin, Mary overcomes the emotional trauma of losing her parents and finds a sense of peace and happiness. The neglected garden represents the possibility of healing and rebirth for those who are willing to nurture it.
Nature's Resilience: Despite years of neglect, the garden still possesses a certain wild beauty. This represents the resilience of nature, which can endure and thrive even in challenging conditions. This resilience reflects Mary's inner strength and her ability to overcome the challenges she faces.