Is this mold?

[SICK51]

This shit has shown up on 3 lower fan leaves. I've plucked them all off. Seems like every day there's another spot on a different leaf. Doesn't seem to bother the top of the plant yet and I'd like to stop it before it does. Plant is 30 days into flower and I'd hate to lose it.

Does it look like mold or are the lower leaves just dieing? Its the 2 dark spots on this leaf. Also the dark tip on the left is a bit crispy, not sure if its even the same thing as the one on the right.

Temps are always 78-83
Humidity 15-25%
Soil ph is right around 6.5
Box fan blowing on plant the 12 hours a day the light is on.

[janemba]

to my it looks like a phosphorus deficiency, it is in flower mode and using all the avalible p-k... with a p deficiency the leaves and stems turn a redish purple. alot of the time when u see a purple leaf or two in a nug, its just lack of phosphorus.
mold is usualy looks like powder or fuzz

[SICK51]

Originally Posted by janemba

to my it looks like a phosphorus deficiency, it is in flower mode and using all the avalible p-k... with a p deficiency the leaves and stems turn a redish purple. alot of the time when u see a purple leaf or two in a nug, its just lack of phosphorus.
mold is usualy looks like powder or fuzz

Thanks, but I'm referring to the black spots on the leave. If you click and zoom in you'll see. I'm not concerned with the purple as it was expected with this strain.

[janemba]

yeah its called necrosis, its death spots on the leaves also a sympton of p dificiency
a drop in temp when the lights are off will cause this

[SICK51]

Thanks

[janemba]

i should elaborate, i cant 100% tell that its a p dificiency from that pic, if that spot on the leaf is dry and brittle its necrosis, if is soft and moist and raised like it doesnt look like its apart of the leaf, rather growing on the leaf, its mold.
but good luck she looks pretty