dark splotches on leaves

does anybody know what this can possibly be?




Thanks

Nutrient deficiency? No bugs or powdery mildew. N P K & Cal-Mag needs. Early-ish if all else is looking and growing well. Lower leaves, mobile and macronutrient need. The plant is taking available nutrients from leaf that are not enough of in soil or available (pH/temp). So it can keep growing. This is a good chart. Easy to use.

alphapinene said:

does anybody know what this can possibly be?

View attachment 5021485
View attachment 5021486

Thanks

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Phosphorus deficiency

hotrodharley said:

Phosphorus deficiency

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thank you!

And....thats not the only nutrient you are low on.

Snoopy808 said:

And....thats not the only nutrient you are low on.

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like what else? I haven’t fed them yet..they’re in roots original/ocean forest ..i’m gonna start top dressing them next water..

Top dressing, feeding is what they want. A complete fertilizer and or some amendments for the photoperiod will take care of the new growth. The affected areas or whole leaf may not recover, but a fan leaf thats not important, thd new growth is. Phosphorus was low hanging fruit. The red stem. The yellowing could be more phos and or calcium or potassium. The dark patches calcium deficiency little more advanced or potassium. You cant just look at one leaf and nail a diagnosis every time though.Theres other signs on new growth, or overall appearance or looking at roots that can narrow down your answer to whats lacking.