If you want to check out my grow journal you can compare how far along your plants are. Your plant at 5 weeks is about as big as mine at 2 weeks. Even though i am running hydro, the growth rates are not that different. You should have been more concerned with your amount of nodes before flowering. At week five my blueberries are stacked about 10 nodes high and with much more vegetative growth.
How many watts is the cfl your using? and how far away is it?
It will take a while longer but you should consider a re-veg and maybe a new light. Maybe just start over? I'm pulling for ya, but i think starting flowering at this size will hardly yeild.