Outdoor soil, branches dying LST, advanced opinions?

Outdoor plant, lower branches are drying up and randomly dying in a matter of days. The only thing i notice are purple stems where the dying branches come off the main branch or stalk. Ph'd foxfarm nutes at low doses and orange gaurd once a week is all this plants been given. No signs of bugs. Soil is not overwatered. Adding water does not help the wilting branches. Sour diesel.

Any suggestions?

a plant that big can handle a few more nutes, but the purple stems is from a lack of P which can be cause by too much micro nutes in the soil, i would say to flush and start clean with stronger nutes and see if that perks it back up.

Yeah I thought about that but my smaller and younger leaves were turning yellow and dying and figured it needed some more N. I have been added 1000ppm water once a week or less.

And you notice how those leaves are curling up in that first pic? I will try flushing. first soil grow

also it is a pretty large plant

that leaf curling is usually from too much N, not enough to burn but enough to cause that, if your new growth is somewhat light green to yellow that may mean that you need a cal/mag additive, had the same problem in hydro.

still losing a branch every day, i think i got a disease or fungis