A lighting schedule that mimics summer day length is necessary for vegging. (14 or so hours of direct daylight, mimimum) How many hours of direct daylight are they getting?
How are the temps in the window? Any fans to circulate the air?
Also, you mention watering daily. Are you letting the soil dry-out a bit before watering?
3 plants in one pot, or 3 pots? What size pot?
Which soil, what nutes, what nute schedule...
What's the water ph? What's the run-off ph...?