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Sensi Amnesia Auto looking unhealthy :(

evilavocado
evilavocadostarted grow question 2 years ago
Sensi Amnesia Auto looking unhealthy. Week 6 since sprouting. Leaves getting dark brown spots, yellowing and getting crispy. This is my first grow and I'm lost on what to do. Please help :)
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Week 6
Leaves. Tips - Die
Leaves. Curl up
Leaves. Color - Dark-brown
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m0use
m0useanswered grow question 2 years ago
This grow has some nutrient burn in it and lock out from all the extra nutrients in the medium. A flush would be best to try and save it, As much as i hate flushing soil based grows as it compacts the roots and can cut off oxygen supply there is a safe way to do it. Use a low flow sprayer like you see from dollar stores for plants, something with a hand pump and just slowly spray the medium with PH's water till it runs mostly clear and your EC/PPM is with range. Will need to do multiple sprays most likely. monitoring the EC/PPM of the run off is how you know your done, but its not 100% needed just a good tool to have. If you have water pooling on top of the medium waiting to flush through it hold off and lower the flow. collect all the dripping from the plants into something else and use it in an outdoor garden it is food but just to much food for the plants in question. I would also dilute it 3-1 water to plant drips. After this is all done let it drink up the remaining water for a day or two and then give them an appropriate amount of fertilizer. You should invest into getting an TDS pen, they measure the feeding solutions EC/PPM and can help determining the correct concentrations. If this is not an option, 1/2 or even 1/3-1/4 suggested nutrient doses will work well. Given that your growing Autos this is the basic frame work I work off of for concentrations. https://www.autoflower.net/forums/threads/med-man-method-feeding-chart-ppm-ec.47856/ Best Of Luck! ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***
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evilavocado
evilavocadoanswered grow question 2 years ago
Thanks! Ok, so overfeeding is my issue, and flushing is the solution is what I understood :) I have a couple of questions though. @DutchDoobie, you said "manganese deficiency" but later you speak of Magnesium. Did you mean to say Magnesium? :) Also, which Cal-Mag supplements would you recommend? I have Advanced Nutrients - Sensi CalMag Xtra, but I'm afraid this has too much Nitrogen in it. Should I use a different Cal-Mag supplement? Another thing, since I'm a complete newb - do you have any guidelines on building up a good nutrient base after flushing?
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DutchDoobie
DutchDoobieanswered grow question 2 years ago
High evilavocado, This is a manganese dificiency. Calcium, magnesium and iron deficiencies often appear together. The best way to restore is to check the curent pH value from your soil. If the pH value of your soil is not between 6.0 and 6.5 you need to flush your soil with clean pH 6.2 water, and then resupply the water nutrient solution. When your pH is already in this range you need to add the supplement Cal-Mag into your nutrient-water solution to avoid calcium and magnesium deficiencies in the future. The cause of this dificiency could be pH issues or overfeeding. The reason that you need to measure pH is because then you know if it is pH or not enough cal-mag nutritions. Otherwise you will have this problem straight away again after a short amount of time after the flush. I will explain you first how to measure the pH from soil. And after how to flush the nutrients out of the soil. 1. Place soil sample about ¾ full in sample jar and add distilled water to cover soil. 2. Cap the jar and shake the soil vigorously a few times. 3. Let mixture stand 10 minutes to dissolve the salts in the soil. 4. Place the pH tester into the wet soil slurry. 5. Measure pH and record measurement. If the pH is in the right range then you know the nutrients are the problem. In this case you need to add call-mag for after the flush!!! So flush out the build up nutrients with a good flush of your soil. I will explain you how you can do that the best. You can do this flushing by slowly pour water pH 6.2 onto the top of the soil, allowing it to drain freely from the bottom of the pot. Pour slowly, so the water doesn't overflow from the top of the pot. Use approximately four times the pot's volume in water to flush the soil. For example, use 1 gallon of water for a 1 quart pot. After the flushing you need to let the soil (almost) dry out completely. From there you can start giving water with pH 6.2 and nutrients but do not exceed EC 1.5 to make sure that you don't overfeed them and when the pH was NOT in the right range at the first measuring then give the same nutrients as before but now with the right pH 6.2 And when the pH was ALREADY right at the first measuring you need to add call-mag with your nutritions!!! Happy Growing! 😋
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greatwolf
greatwolfanswered grow question 2 years ago
Healthy green leaves for new growth, burn spots on fan leaves, looks like nutrient burn. It needs to be flushed. It also desperately needs a bigger pot. But flush it first. Good luck
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