OMG help me! SOS no time to spare!

I usually would do my research before posting knowing that you can find a lot of information that could be easily answered online, which is what I was going to do until I realized my plant has the same issue as one of my boyfriends that’s on the completely other side of the yard and I want to say a big portion of it is affected. No idea what’s wrong I would say it looks like gray or brownish and it’s in between the veins . Not sure if it’s a mold or what, there has been a lot of feeding lately so maybe it’s some sort of toxicity or burn and it is bad really bad because we are just starting to bloom and I am very worried. It was fine yesterday!!!! We have had pest problems but for it to get this bad this fast is just crazy. I was outside yesterday working on them and didn’t see anything and now I want to say a fifth of my plant is has leaves that are pretty much dead. We grow out door not all of the plants are affected which makes me assume it could be some sort of toxicity he gave them some source of fertilizer yesterday morning. Please help I am going to upload pictures now.

And if some of that doesn’t make sense it’s because I am using talk to text and I injured my right hand so I am a mess right now .

Branch rot?

I really gotta get some outdoor grows under my belt so I can be of use...

I would say over watering or lack of potassium. I do not think this is an over fertilized plant. Outdoor plants can take a hammering of nutrients.

Can you take pictures of the fully dead part of the plant?

Best thing to do is stay calm

Edit: Did the plants get sprayed with a hoze while in direct sunlight/hottest part of the day?

The Gram Reaper said:

I really gotta get some outdoor grows under my belt so I can be of use...

I would say over watering or lack of potassium. I do not think this is an over fertilized plant. Outdoor plants can take a hammering of nutrients.

Can you take pictures of the fully dead part of the plant?

Best thing to do is stay calm

Edit: Did the plants get sprayed with a hoze while in direct sunlight/hottest part of the day?

Click to expand...

Goddamn, horrible

Seems like some kind of fungal infection

Check underside of leave for russet mites too

Most of my grows have been out doors, and this looks like you might and have sprayed the leaves while watering and heat got them, just keep a eye on the pH and heat, try watering at night time for awhile . And some mag wouldn't hurt, but mainly just keep checking on it and make small changes till you fix it.

under/over watering it seems

you maybe are missing a part of the root mass with the watering OR
part of the root mass is getting too much water and rotting underneath the ground .... OR

since you gave it fertilizer yesterday perhaps that plant got burned by the end of the fertilizer because it wasn't mixed properly

hope this helps somehow. If u think its overfert, I would give it a little flush with some clean water

that looks like ph damage, from being way high or low with your ph. not guaranteeing it, but it sure looks like that...
i've never seen it go that far, so i can't say for sure that's what it is, i always check and correct my ph if i ever see any damage of that kind starting up...
i'd check and calibrate my ph meter before i went on a bug hunt. if it's in good shape, then i honestly have no idea what could cause that kind of damage.

FresnoFarmer said:

Seems like some kind of fungal infection

Click to expand...

Agree. Fungus aka blight. The spread and especially the color described. This is the second case of this here in a week.

UncleBuck said:

Branch rot?

Click to expand...

Possibly could be.

I was thinking maybe an attack of some kind of stem borer for it to attack one branch like it is.

Leaf issue could be unrelated.

When a branch looks like it’s dying only on that branch it can’t be an underwatering issue otherwise whole plant would be effected.

I’m thinking deficiency is a problem and there branch issue may be a separate problem.