Not seen before

Hi Guys ill keep it short and sweet growing in coco ph between 5.6 and 5.8 the ec has been gradually moved up and the issue started at ec 1.6.
They are 4 weeks into flowering and only at the top the leaf tips are curling up and going rusty also and i have not seen this before down the leaves there are brown strips in between the leaf veins now they are perfect strips i couldnt have drawn them better.
I have reduced ec down to 1.3 on least affected and a couple that are slightly worse im going to flush with ec 0.7 because i havent encountered this before not sure whats best anybody come across this before.

Sounds like you need a good dose of calmag but a picture speaks a thousand words.



J

heres a pic

Preferably a plant picture.

But on initial looks it could be a heat issue.

At what part of the plant was the leaf?


J

its all on the top part of the plant the middle and lower parts are fine heat gets to 83 max

Its a pretty crude method in coco but have you tested your 20% runoff for its EC level?

What did it come out at?

J