Yellow leaves

i have a 16" approx 2 month old female and the bottom leaves are yellowing..and then the bottom small leaves that are just branching off are turning completely yellow and dying..i dont use any kind of fert. and i used miracle grow. never changed the soil
just water.
any suggestions of what it could be and how to fix/prevent it?

and also...i have another plant 18" no pistils or pollen sacs? if i continue to grow it and move it into the flowering stage and dry it out and what not...it will have no potency correct?

thanks for all the help.

The odds are high that they need nitrogen

thanks for replying.
its weird cuz the other plant is way bigger and stronger and has nothing wrong. same soil and everything

where do you get nitrogen from

Give them a all purpose fertilizer

do i mix it with their water and leaf feed them too? and for how long? until it goes away?

Mix with your water. It will take a week or 2 to clear up. 1 time a week

ok thank yyouuuu!!!!!!