Brown spots, help please

[greenGG]

hi,i have some brown spots on my leaves that keep spreading and the leaves eventually wither and die. i tried using neem oil thinking it was leaf miners but it wasnt, it has affected an entire crop and i cnt figure out what is the cause because i dnt see any pests. it seems to b attacking from the bottom because the bottom part of the plant has no leaves..can someone help me please

 

[Conradino23]

Posting pics would help, but my guess is that you got a nutrient issue and a mobile one, probably P.

 

[nibec]

I'll sub to this so I can try to help once you have pics

 

[Scarfinger68]

Posting pics would help, but my guess is that you got a nutrient issue and a mobile one, probably P.

1st thing is to find out what the PH is? Sounds like a lock out starting or Low PH. Flush and let dry, flush again and add 1/4 to 1/2 strength nutes. It wont look any better but it should stop spreading. Look at new growth to see how the plant is doing.

 

[FrankFoster]

when you wet it all down too much and it is stale wet-soppy... ph lockout of P causes necrosis.
If you are over-wetting it...

I bet your ph has gone up to above 7.8 mark and your your chemicals are burning her underskirt...