Jack Herer - First grow

all is normal the plant is nearing the end of its life cycle, every last bit of energy in to those nice buds, enjoy your smoke you did a real nice job

Too much water in my humble opinion. I noticed that when late into flowering they don't use hardly any water at all. I quit watering mine about 10 days prior to harvest

Just what @greywolf said. The plant is pulling stored nuits from the roots n leaves. Nothing to worry about.