Browning leaves in flower

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Need help ASAP. I'm in dwc and my ppms are 600 and 368 of that is cal mag. I have a few stems that are slightly purple, so I've been slowly upping the cal mag every water change. She drinks about a gallon a day. Blue dream auto. The problem is I've noticed some of the top bud sites have leaves that are starting to Brown. Should I bring the cal mag down some or do i need to bring my pk up? I'm on week 9 and she just started swelling, I don't wanna mess her up this late in the game
 

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Why are you upping the cal/mg?

Purple stems can...CAN be a sign of K deficiency, but more than likely is genetic.

Revert to recommended ppm.

And show us the leaves, and we'll look there too.
 
The CalMags I've seen also have nitrogen.

I'd recommend looking at the nute company's feed chart to find how much calmag, veg, and bloom nutes they recommend, and then use a fraction that to keep ppm below 600.
I get nute burn in the high 400s ppm (500 scale).

With only 232 ppm of non-calmag stuff, you might get deficiencies.
I allow CalMag to be about 25% of total ppm.

Purple stems can be genetic.
 
Thanks for the quick response guys . I'm gonna take your advice and back off the cal mag to 225 add more pk, and bring the Ppms to down to 550 hopefully she'll be fine. Could any of you give me a guesstimate of how long she has left? I'm gonna use M.O.A.B. and I don't wanna add it too early.
 
Oh and here are my leaves.
 

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I just went and looked, the strain shows color regularly, so probably just that. Your on the right track... onward!
 
Thanks for the quick response guys . I'm gonna take your advice and back off the cal mag to 225 add more pk, and bring the Ppms to down to 550 hopefully she'll be fine. Could any of you give me a guesstimate of how long she has left? I'm gonna use M.O.A.B. and I don't wanna add it too early.

When to harvest is a common problem.
Most of my strains go 12-14 weeks total, and trichomes are inconclusive.
I'm not a good judge, but I'd guess another 4 weeks.
 
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