First off, peeps are going to get PISSED if you keep reposting the same question over and over and over.
Second, pictures are very important in diagnosing plant problems.
If you can't post pics, you need to give us as much of this information as you can fill in:

-indoor or outdoor
-soil, soilless, or hydroponic
-Soil type/brand
-Anything you have added to the soil
-Soil pH
-Water source
-Water pH
-Age of plant
-Type of fertilizer
-Rate of application
-Lighting source and distance from plant
-Temperature (both day and night if you are running a dark period)
-% Relative humidity
-Lighting schedule
-Type of ventilation your room has

When you say sun hits it, is it outdoors or on a windowsill?