Centre of leaf browning/dying on only a few tops.

goatlicker · May 8, 2019

3 weeks into flower, this started happening on a few of the tops.
Under 400w hps @ 18inchs, 21c-25c lights on.

goatlicker · May 8, 2019

Anyone?

Gond00s · May 8, 2019

check ph of soil look up soil slurry

goatlicker · May 9, 2019

Gond00s said:
check ph of soil look up soil slurry

Took a soil sample from top and is around 7.2. Didn't want to go digging deep for a true reading. Do you think it's high or low?

joe9000 · May 9, 2019

could you have dripped something on it,or light bleaching??

Capn-Crunch · May 9, 2019

Looks like a calcium magnesium issue to me
Try to get your PH down to 6.2 to 6.5

Gond00s · May 9, 2019

Good chance your soil ph is drifting up so just start using water at like 6.3

goatlicker · May 9, 2019

joe9000 said:
could you have dripped something on it,or light bleaching??

It does look a bit like that but the others aren't getting it? I raised the light a bit to see if that helps anyhow.

Capn-Crunch said:
Looks like a calcium magnesium issue to me
Try to get your PH down to 6.2 to 6.5

I'll add some cal/mag next feeding and ph lower than usual. I'd already added cal/mag about a week n half ago.

Gond00s said:
Good chance your soil ph is drifting up so just start using water at like 6.3

Mm, no worries. Will try that thankyou.