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RQS Jack Automatic: Claw leaves, nutrient burns and yellowing leaves. First grow, many mistakes
GreenAnarchystarted grow question 4 years ago
Noticed claw leaves and purple stem, identified Nitrogen overfert, also had some tips burnt
Once I reduced the nutrients some leaves turned yellow, at the same time the burns spread
Flushed the soil with ph balanced water and stopped nutes
What should I do now?
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Calatheaanswered grow question 4 years ago
looks like you had a nitrogen abundance for sure! Flushing was a good choice. Make sure to start feeding with a lower (very low) dose of nitrogen after the flush BUT you have also flushed all the other nutrients than nitrogen. Meaning:
Leaves turning yellow after the flush would be quite a fast reaction (from nitrogen abundance to nitrogen deficiency)
Its more likely that you have washed out all of the magnesium and the plant suffers from a magnesium deficiency.
(Symptoms are almost the same as nitrogen deficiency)
I would recommend adding some extra CalMag + feeding with half amount of nitrogen that you've used before. If all the leaves turn pale green (although you've been feeding extra CalMag) you can consider raising the amount of nitrogen again until you've found the sweet spot for nitrogen.
Ttrichomeanswered grow question 4 years ago
Nitrogen toxicity leads to the lockout of other nutrients resulting in deficiencies across the board. By flushing the medium and balancing the ph u helped aile ur nitrogen toxicity. But with a flushed medium if u fixed ur lockout there will be no available nutrients to fix ur deficiency. I'd give a half dose feeding of everything but Nitrogen. Slowly elevate ur dose from there depending on how ur plant responds. Flushing ur medium and leaving it stripped of all nutrition will only worsen ur deficiency.
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GreenAnarchyanswered grow question 4 years ago
Unfortunately I don't have an EC meter and I can't get it in few days, I would have to wait a week or two to get one.
During the flush the water that drained was transparent but I know that this means nothing...
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ijustdontgiveafanswered grow question 4 years ago
If i were you i'd get an EC meter and measure the run-off to see exact values of your feeding behavior.. this can then tell you if there's still a high value in the soil or not (it will only tell the overall salt-content, not the individual dosages of the different nutrients).
the dark green would indicate too much nitrogen, however the yellowing around the veins can be a result of too little magnesium..
since you're on soil, i also recommend reading this: https://www.mandalaseeds.com/Guides/Fertilizing-Smart-Guide
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