leaf problem - first time grow

Hi guys, I've searched for like an hour trying to find out what my leaf problem could be but I can't seem to find an answer. Does anyone know what it might be? They start off with yellow edges then turn completely yellow.

Well to answer you we need more information. What growing in, size on pots, soil or hydro, lights, ph of water you use and ph of soil or growing medium, are you using any nutrients.?It looks like nute burn or a deficiency, check the stickey above, it lists plant problems. To me it looks like nutrient burn, how big are the plants? Hope this helps, peace.

Thanks for the advice. I've just been looking at some guides and think i've been feeding it too much. I'm just gonna leave it for a while and water as normal.

It looks burnt.