Rust spot on leaves

[Beezelbuz]

This is my girl scout cookies. She is in pre flower and giving her 1.3 ec of nutes at around 5.8 ph. I am seeing a few leaves with slight rust spots on them. Most leaves look fine. Just raised ph to 6.1 to uptake more cal/mag

Another wierd issue is some of my leaves looked burnt but only on one side... very strange. Pics attached

 

[hotrodharley]

Medium? How much cal mag are you giving? Looks like early potassium deficiency. Excess calcium a major cause.

 

[Beezelbuz]

Coco is the medium

 

[Beezelbuz]

Also giving a bit over 2ml a gallon of cal/mag in ro water

 

[hotrodharley]

Also giving a bit over 2ml a gallon of cal/mag in ro water

Put your cal mag in the water and measure EC.

 

[Beezelbuz]

Well cal,mag goes in after all other nutes but afterward ec is 1.7 which I water down to 1.3 for feed

 

[hotrodharley]

Well cal,mag goes in after all other nutes but afterward ec is 1.7 which I water down to 1.3 for feed

Kind of backwards. At least in my experience. However I'll repeat. Add just cal mag to the water and measure the EC.