Auto OG

This is the last week until I start adding some nutrients. So you guessed it only feeding her 1/2 teaspoon per gallon. She's drinking a full gallon each water. Minimal run off. She's in a 5 gallon smart pot. At this point I'm very worried because she is rapidly growing and has already hit the ceiling of my box. I decided to take a piece of string and tie her down so the light can hit the whole plant.