HELP! — NEED TO DIAGNOSE DEFICIENCY

I’m on day 6 of flowering, and my leaves have started to yellow, developing “burnt” tips and some brown spots. Seems like it’s a mobile deficiency since it’s starting from the bottom, but not entirely sure. Using the Athena Pro Line with 5.8 pH water. Any help would be appreciated!

K def. , and a probable mag def.

K and mg are antagonists so DON'T just go throwing more k or calmag unless you're underfeeding. How heavy and what all are you feeding

PapiWasabi said:

I’m on day 6 of flowering, and my leaves have started to yellow, developing “burnt” tips and some brown spots. Seems like it’s a mobile deficiency since it’s starting from the bottom, but not entirely sure. Using the Athena Pro Line with 5.8 pH water. Any help would be appreciated!

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Looks like K deficiency. But it could be pH related. Or lockout due to antagonist nutrients like Mg and Ca, like Ball Itcher said. Don't know about your medium and all that.

MyBallzItch said:

K and mg are antagonists so DON'T just go throwing more k or calmag unless you're underfeeding. How heavy and what all are you feeding

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Growing in Coco with Athena Pro Line (using the recommended amounts w a target of 3.0 EC / 1500 ppm and a pH of 5..

yeah, I agree. Didn’t want to just throw in calmag and call it a day.

PadawanWarrior said:

Looks like K deficiency. But it could be pH related. Or lockout due to antagonist nutrients like Mg and Ca, like Ball Itcher said. Don't know about your medium and all that.

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following the Athena pro line program. We are growing in coco. pH is balanced to 5. 8 each time. Maybe I need to go more alkaline?

Nixs said:

K def. , and a probable mag def.

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yeah I think so too. Girls just woke up, so gonna do a runoff test. Any advice on how I should correct this lockout issue?

PapiWasabi said:

Growing in Coco with Athena Pro Line (using the recommended amounts w a target of 3.0 EC / 1500 ppm and a pH of 5..

yeah, I agree. Didn’t want to just throw in calmag and call it a day.

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Sounds like maybe too much. I don't use that stuff, but I'd do half strength and see how they respond.

I would flush with proper PH water for two feedings

GreauxFast said:

I would flush with proper PH water for two feedings

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In coco?
WELCOME to RIU

I’m in coco and I dont go over 700ppm anymore and haven’t seen a deficiency in ages. I’d mix up a batch of nutes around that concentration and run a shit load of it through my pots if I were you.
The antagonistic relationship with certain elements can be a real pain to sort out. That mg-k loop caught me when I used to use a bunch of bottles and tried to push everything hard.