Late outdoor NYDiesCBD Purplebudauto

Hi everyone! Terrible week. I think it was a bad idea using coconut in the soil, cause i dont control it. On the 27th i woke up and one of the purples was with the leaves facing down i thought it could be a lack of water and i watered with 200ml and it died anyway, probably cause of overwatering. On the 28th I watered the resting ones 400 ml with terra leaves and rootfast cause I dont know if they are too humid inside, the surface of th soil was dry. 29 th morning the dinamed stem is broken by the wind and the leaves facing down, it was the one I need the most so I am trying to save her. The purple is completely dead and the NYdiesel CBD and the good purple look good. I am moisturing another 3 autos to see if I can save the season but it is really looking bad, like I wont use coconut and if somebody can help me I could be great ! Regards from a broken soul ...