New growth leaves turning black

Outdoor plant
2-3 months growth
no nutes
periodic spray w/ Neem oil and copper sulfide

I’m stumped and any help would be appreciated

Wow bruh… thats new to me. Lets see who we can find…

@Draco1 @Drinkslinger @Myfriendis410 @SKORPION @Cannabian @kaptain3d

Hopefully you mean copper sulfate.

How about an overall picture of the plant.

1 Like

Sorry, yes sulfate…the blue stuff

Soil type? And have you a massive swing in temperature lately?

Fairly acidic, but w/ decent amount of lime added
Summer’s been pretty average in Chicago area
I did find some stuff on “purple disease”, w/ identical pics, but no clear understanding of the cause and it was fairly transitory for most plants

thanks for the interest

look up magnesium deficiency in cannabis for fun.