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Leaf edge and tip curled down

Mraadystarted grow question 20d ago

After uncertain 7 day of dryback i did a feed of 955ppm and got only 100ml runoff and after 2 days rusty patch appeard leafs and tip curled down does second feed of 700ppm and 20% of runoff can fix it ? Day 50 Coco soil 50/50 mix Strawberry milk and qookies night owl

Mraady

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Leaves. Curl down

Leaves. Color - Dark-brown

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Organomananswered grow question 20d ago

This plant is suffering from long term over feeding. Giving more feed will not fix anything, only make things worse. Always water with plain water first before fertilizing.........never fertilize a plant in dried substrate. You should also adopt a schedule of plain water/plain water/fertilizer........never fertilize every time you irrigate. I would suggest just giving plain water, no nutrients at all, until the plant stops curling down and growth picks up. Do not fertilize again until the plant is looking better! The brown blotches (burning!) is from nitrogen toxicity......it is NOT a deficiency of iron, magnesium or potassium!! And yes, getting run off each time you irrigate is essential.

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Selkotanswered grow question 20d ago

hey 👋 I would say double deficiency: primarily potassium, and also magnesium, probably due to a lockout (pH, EC, or both). The soil/coco mix isn’t ideal, those two substrates tolerate different, antagonistic pH ranges ; so I think you’re dealing with a salt buildup here. If I were you, I’d start with a light flush (just enough to clean out the salts) using low-pH water, around 5.8. After that, I’d resume feeding with Bloom nutrients with a good dose of potassium nut not too much nitrogen, and a solid Calmag supplement, all in water adjusted to a pH of 6–6.2. The affected leaves won’t recover, but if the new growth comes out a healthy green within 4–5 days, your problem is solved 👍

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Green_clawsanswered grow question 20d ago

iron deficancey...probably

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Captain_7answered grow question 20d ago

I’m going to say the brown leaf spots and dark green leaves is a bit of nutrient burn. If you’re using chemical nutes, that’s on the strong side. I’d aim for around a 500 - 600ppm nutrient solution.

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