Shes about 22 days old and is an autoflower. The pH is 6.5 and she was due for a nute'ing today, maybe she used it up too fast and starved? I can't tell, if y'all blades could help a brother out
ph is to high unless your in soil... coco,hydrocorn LOVES 5.8(optimum) but 5.5-6.2 they manage.. I use fulvic acid and this is a chelator (aids in nute uptake in wide range of ph) Anything above or below these results in death.. Whats the ppm in the runoff? If you dont know take water and know what starting ppm's are. Then dump enough that it flows out the bottom of you pot.. Whats the reading? F or that size plant 700-1000 ppm is a fair feeding range.. Also use perlite if there water loged.. o also the red rusting spots is a calcium diffency