I just ended week 4 of flower, did a good amount of defoliation at the end of week three and since then my lower leaves of 3 plants are yellowing and turning brown on the edges and tips the top of the plants seem fine ( ill attach a picture of the top ) and the leaves are definitely dying. Im in ffof running synthetics with cal mag at 6ml gal, runoff was 6.51 1390ppm on the worst yellowing one the others are right near those numbers. These pictures were taken right after a watering. Any ideas ? Thanks for any answers
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Is there any possibility of nutrient lock ? Looks like a few things, the tips and edging looks like phos def and the yellowing look nitrogen def . . .
Just my .02
I will say, all the ppm measurements are stuff I do not understand.
Kind of looks like multiple deficiencies. What nutrient lineup are you using? Have you flushed at all throughout the grow?
This is how they are looking today, definitely getting worse. I wouldn't think im overwatering because i water when i can pick the pots up with one hand which is usually around 3 days, maybe a nitrogen deficiency its starting to move up the plant by the looks of it. Its affecting multiple plants at the same time
How often you water?
@Mr. Grow It I don't believe it's mag then. I need a more experienced opinion on this. The new pics show it better.
Hard to tell in that lighting, but the way the tips of the leaves look, does it look like Magnesium deficiency? https://www.mrgrowit.com/post/magnesium-deficiency-in-cannabis-plants