Yellow leaves on White Widow plant

[SkunkJosh]

Hi guys!
I'm growing a plant of White Widow since two months, until now everything went fine but now the leaves on the bottom of the plant are starting to get yellow; does anyone know how I can put it right?
Thanks so much!

 

[noyd666]

any photos' mate.

 

[Capt.Ahab]

If you are a few weeks into flowering you can expect some of the larger bottom leaves to start withering and falling off.

 

[Sat X RB]

sounds like normal fan leaf 'senescence' to me too. how's the upper growth?