Someone F***ing HELP me! Dark spots spreading from the bottom leaves up, then DIEING!

Please someone HELP solve this!!!! The actual plant as u can see is still growing strong and Healthy, just the bottom leaves are dieing then falling off and its spreading upward!!! I havent been giving it too much Nutes, hoping it was an individual problem with the plant as you can see there are two plants growing side by side and the other plant receives the same amount of nutes and water, yet hasnt showed signes of any dark spots!!!! HELP!!!!!!!!

Bottom up is the new growth taking from the old growth, up your feeding JUST A TAD... But I like to cut those lower branches off anyway, they wont produce a whole lot so I like to give the energy to the upper branches..

Nothing to fret tho, they look good..

It is becuse of your lighting get more lights your plant are realy streatchy get some cfls all arowned the plant will help alot more. You will get lighting to all the buds get more veg and buds over all worth it to spend 20 bucks for a exstra ounce!!