Phosphorous deficiency??

400W hps
coco with flora series nutrient line
Ph 5.8 ish
6 weeks into flowering

Im thinking I have some phosphorus deficiency going on? Its only showing up on the bottom leaves the rest of the plants look very healthy. I think this is normal going into the 7th week of flowering but I want to make sure. Im currently watering full strength as indicated on the flora series bottles...do I need to get a supplement that contains some more P? help would be awesome!

thanks guys!

Dude your fine. In fact, they look STELLAR!!! I'd say it's just normal senescence.

thanks for the fast response! I guess Ill just keeping running the course Im on for a few more weeks until flushing! I CANT WAIT! haha thanks again.