Does anyone know what this is?

Does anyone know what this is?
Growing in soil Super Soil using Recipe by Subcool
I have been using the Dyna-Gro religiously to their soil feeding chart.
The ph has been between 6.3 and 6.5.
My water is well water and during the winter the ph drops a lot. So I have to add ph up and I try not to over use it. Therefore the ph has been low (6.3) for awhile. I like to keep it at 6.5

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I thought the idea of subcools super soil was that its a water only soil. I dont know exactly what dynagro is. But, wouldnt dumping chelated non organic nutes into organic soil essentially kill off the organics of the soil?

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I don’t know. I wasn’t aware that it was organic only. I just started using it. It looked good on paper and the plants are doing good. Lol

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I think it maybe a magnesium deficiency.
Any input? What do you guys think?

Yeah man, the whole point of super soil is that it is water only. It’s probably being burned from over feeding. And as Grohio said, the salts in bottles nutes will slowly kill off the beneficial bacteria in the super soil.

Dark green leaves, starting to claw at the tips, plus tip burn. I’d guess they’re getting too much.

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I was kind of inaccurate when I said, “I have been using the Dyna-Gro religiously to their soil feeding chart.” Because I use the blumat classics to constantly water it as needed. The blumats only water with plain water with ph of 6.5. The only time I add extra water/nutes is when the soil seems dry. About one half liter a week. The chart I use to know how much nutes per liter to add for that week.
They were supposed to be ready for harvest last weekend. But still need more time.

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Light bleaching perhaps ? … did any of the foliage get wet and stay on the plant while the lights kicked on?

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I agree with the above statement additional nutes shouldn’t be added to a super soil

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I would try using only water, then slowly raising the fertilizer in the solution by 10% of whatever you are feeding it now each time you water to get a feeling of what you should be feeding it. Or try backing off the fertilizer by 50% but otherwise keep doing what you are doing.

With such a rich soil, you could try using a little bit of fertilizer when you start seeing them look yellow-green. Yours are very emerald green, and get plenty of nutrition.

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Looks like nutrient burn to me.

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I see tip burn so probably is lil hot. I Often don’t use the strength fert manufactures recommended. I’d say half Recommended strength is better starting point. They are in the business of selling fertilizer after all.
Edit: sounds like even less if you’ve got a precharched soil recipe😀.

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Leaf tip burn is normally associated with over fertilization and/or a soil salt level that is too high. Sodium directly interferes with the plants ability to uptake calcium, magnesium and potassium

You said you use well water and the pH changes in winter… do you happen to know what the sodium level of your well water is? You may want to find out.
There are three things found in water that can harm your plants. Having too much Chlorine, Fluoride or Sodium in your water will cause leaf tip burn.
Leaf tip burn directly correlates with root tip burn. Plant roots only uptake water/nutrients with the root tips, so dying root tips are a huge stressor for the plant and can cause even more problems down the road.

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I looked it up (didn’t test my personal well water). In this area the reports show well water highest sodium content is about 75-85 milligrams per liter of water. I’m not sure if that’s good or bad.

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Thanks everyone for the great replies. I stopped feeding it. Just plain ph’ed water from now till harvest. All this info will help me for I start growing my next plants.
Thanks!

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was supposed to be ready for harvest? how about a picture of the whole plant… if it’s near the end of flower i wouldn’t worry about it, just keep with plain water until harvest.

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Plants can be harmed if the water sodium level exceeds 70 mg per liter.

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