She's pretty small for being outside for almost three months, but she looks very healthy. Are you feeding her?
This is an issue in my vegetable garden. This year, due to my arthritis, I didn't get compost in a couple of my raised beds for tomatos. Today, the four beds with compost have big beautiful five foot plants. The two beds that didn't get compost have three fooot, just as beautiful plants. The lack of nutrients in the soil isn't dmaging their health, but it will certainly damage the harvest numbers.