Really creepy, but I’m not sure how someone would live long enough or get enough nutrition to grow much on a diet of oak leaves.
Scurvy, malnutrition, and dehydration would probably have caused her to lose consciousness and starve to death long before she could grow appreciably.

Wow, creepy. It reminds me of the old school fairy tales! Great job. =)

The idea alone is so creepy. I disagree White Hat, it doesn’t really matter that much if this is realistic or not. Just add some insects and fruit, but that’s not really the point the way I see it. I would suggest polishing it a bit, but it is already very good in my opinion.