Sooner the better. you are going to haveto stress her by transplanting at somepoint so if possible get her in her new home asap she will grow alot quicker and larger as she will have much more space to expand her root system and we all know a plant can only be as large as its root system its attached too so the more room the better part of the reason in my dwc set I use very large 30L buckets to maximize the amount of space the roots have to keep growing and growing :) anyway this is your plant you do what the hell you want bro :) and im jealous of your city view looks awesome :)