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Plant problems dead spots

J

jamiestrevel

New member
My plants are a week from harvest and are getting dead brown spots all over the leaves. Could someone please help me figure out what’s going on.
 

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Brown spots on large sun leaves is typically what happens when aa plant begins flower. That being said, I'm more concerned that you feel that you are a week from harvest. There's a great article here on GWE about when it is best to harvest.
 
I'm with crucialbunny re harvest. You have a lot longer than a week to go.

Check your pH of the solution you are feeding it.

I got these on one of my sativas well into flower when my pH was too high and I diagnosed it as a boron deficiency which is quite an unusual one for me to have.

I fixed it by simply correcting the pH.
 
I should have specified in my post I have a few plants in flower that will be ready in a couple of weeks, but not the ones in the picture. I always check my Ph which I kept slightly below 7
 
From the pic it looks like you're in week 3 - 4 of flower? If you're under LED I would say it's probably mag deficient. Leaf senescense, like crucialbunny mentioned, typically starts to happen around week 6 - 7.
 
I've had a chance to click on your pics and can say it's not a boron deficiency.

If they were outdoors I'd say it was birdshit but its not that either.

It doesnt look like any deficiency I am familiar with. Get out the loupe and have a close look.

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Try keeping your pH between 6.3 and 6.7. 6.5 will be the sweet spot in soil.

Check your runoff pH to see how close it is to your feed pH. Could be your soil pH locking out certain nutrient ions.
 
So it ended up being the start of mold and bud rot. I saved what I could this year. But I’ve never had it spread that quick. I keep 2 fan on high going at all times in my greenhouse.
 
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