What could be causing this? Three plants in the same tent and this is the only one with yellow tips. Plants are watered twice a week and fed once a week using FF nutes. DLI at this plant is around 53. The other two are 48ish. Nute solution is PhD to 6.5 at every feeding/watering.
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She is on the edge of being hot with nutes. A little tip painting is ok. I prefer it. Shows maximum uptake. Just keep an eye out. As long as stays there you are golden. Leaves the tips back down nutes a bit. Just my thoughts.
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Nice plants by the way.
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I agree with @Storm you also keep in mind you have to treat each plant differently they all are different with water and food intake
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Thanks… I’ll skip a feeding and see where she goes.
Thank you. Barney’s Farm Biscotti Mintz photo fems. About 45 days from seed.
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Thank you, makes sense. I’ll have to change the mindset a bit. Been treating them all the same way expecting the same results.
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Heh… Kinda cool looking for sure. 
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Just started a biscotti mintz from barney myself yesterday
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Nice looking plants. Great job. I hope your buds are fat and frosty!
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to run off and if so what is the PH and PPMs?
a little high in my experience with some plants I’ve grown. I’m usually around - DLI of 35 for this growth stage. 3 things that I think could cause the yellowing in the pics. 
Light stress
Environment
Pushing high nutrients
I’m thinking light stress
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