My plant is two weeks into flowering (female) and recently a week or so, some of its bottom leaves have been dying off, the PH is around the right place and i'm feeding it the proper amounts of nutrients. suspected a N deffiency but that doesn't really equal with its PH or the nutes i've been handing it. was having this problem then it halted for awhile, i've watered it with only water the last time or two, though only after this problem started. Is it natural for a 2foot + plant to have its bottom leaves die off (some of them?) not enough light? Or should I examine this problem in fuller detail?