I noticed yesterday that her stalk has been growing at a strange angle which has kept her short (see picture 4). Fortunately the stalk has started to grow straight up towards the light again so I'm sure she'll be fine.
So far she looks healthy and happy. I was told that the Roots Organic potting soil I'm using only has enough nutrients to last 2-3 weeks so I am going to start her on a light dose of veg nutes in a few days.