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I have got some problem...

Keepongrow
Keepongrowstarted grow question 15h ago
Hello, I have some autoflowering plants that are about 50 days old. They were initially grown with sunlight and now integrate sunlight and a 9-hour LED lamp. For about ten days now, I've had these problems on the leaves... Is it a problem with the distance from the light or the p
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00110001001001111O
00110001001001111Oanswered grow question 4h ago
Based on description i'd wager it's too much light. Can look up average DLI for your region and month of year, then estimate howmuch you are adding with the LED application... if it's over 35-40, probably the light. --------------------------------------- after ruling out the light... i'd want to see how they recover before reacting if the light is the cause. if the light is not the cause can go directly into ruling out potential nute-related causes. Does not look related to low phosphorous. If anything might be too much p/k as new growth has spindly leaves and chlorosis, but that could be light related too. Easy to rull out the light first.. often instructed to dump loads of p and k in flower and only results in damaged canopies and buying expensive overpriced products more frequently. leaves are a bit glossy. maybe too much N. possibly some irrigation habits need to be fixed 1) fully saturate (10% runoff if soilless, religiously) 2) wait for appropriate dryback/loss of weight. never half-ass a watering... never choose some volume to give. if it doesn't fully saturate, it's the wrong volume.
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Ultraviolet
Ultravioletanswered grow question 9h ago
Presenting as immobile, tips yellow, I see what looks like wind burn, some leaves look to be altering shape but I'm not sure, possible there is too much airflow going on too. Iron is the most likely cause for new, light green growth with yellow on the margins because iron is immobile. Pottasium can also cause yellowing in the margins, though it's more common on older leaves being mobile. Possibly iron linked to high pH levels, excessive watering screwing the medium, or too much phosphorus.
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Nocone_Purple
Nocone_Purpleanswered grow question 12h ago
Looks like a bit of light stress those mixed light setups (sun + LED) can easily push PPFD higher than expected, especially midday. Try raising the LED a bit or dimming it slightly when sunlight is strong. Also, check pH (keep it around 6.0–6.3) to make sure nutrients are absorbed properly. Nothing serious just minor stress, she’ll bounce back quick
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HydroLab-Germany
HydroLab-Germanyanswered grow question 13h ago
The leaves show yellowing that mainly affects the tips and edges, while the leaf veins remain comparatively dark green (this is called interveinal chlorosis). This specific combination of symptoms strongly indicates a potassium deficiency or a magnesium deficiency — or, most likely, a nutrient lockout caused by an incorrect pH level, which prevents the plant from absorbing these nutrients.
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John_Kramer
John_Krameranswered grow question 14h ago
Ca,Mg def or lock due to K excess if it's more then 250 ppm
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