pics...deficiency

the second pic is what i consider the "stages" it starts like the far right leaf, and the center stays green while the outside yellows until it gets to the far left pic, where it gets crunchy.

It only happens mid/end of flowering and has happened on my last 3 grows. I run the "head" formula in coco. (6ml micro 9ml bloom) ph'd at 5.7-5.9

from reading it looks like mag def with the tips curling up but im not 100% sure

have u tried a mag supplement?

How big are the pots? by that time it could be too rootbound.

I have added calimagic from GH but it still comes. They are in 15 gallon totes. I noticed around 6 ph cal/mag is absorbed a lot more, maybe raise PH?

i dont know if mag def is 100% what it is tho thats why i'm asking

Originally Posted by glann

the second pic is what i consider the "stages" it starts like the far right leaf, and the center stays green while the outside yellows until it gets to the far left pic, where it gets crunchy.

It only happens mid/end of flowering and has happened on my last 3 grows. I run the "head" formula in coco. (6ml micro 9ml bloom) ph'd at 5.7-5.9

Mid to end of flowering - Mg def. Prob starts lower and works up, judging by the size of the leaves in picture. Also looks like P & K which u need to add more of at this stage.

No mention of EC or PPM. This is very important in hydro. PH ok but whats the run off? What water do u use?

I haven't checked PPM in a while- just running the 6/9 head formula. On my next run i may increase it 10-15% and see what we get. It's not bad it'll just be 3-4 leaves per plant around week 6.

Is this happening across multiple strains? Or your last 3 have all been cuts from one mum?