flower week 3, brown streaks. small circles on some leaves

Hey im in week 3 of flower and all of a sudden i started getting these small brown cirlcles on the leaf edges that then turned into a kinda of streak on the edges. im feeding 1000ppm to 1200ppm on .5 scale..

I am using R.o water and i added 150-250 ppms of calmag. i just did a feeding of 1200 including the 250 of calmag. because it looks like a calcium deficiency to me. maybe even a potassium? what do you think?

sorry the pictures i attached arent of better quality. the leafs arent cupping on the plant, that just happened after i cut the leaves off to take picture. so dont try and diagnose the cupping lol

im using Gh 3 part nutrients as well. ph is 6.0-6.3 . Im using Tupur soil, which is a coco and aged forest materials mix. so thats why the higher ph then if i was using pure coco.


My plan if the feeding i just gave them of upped cal mag doesnt work along with plenty of potassium i added.

Than im going to flush it with 900 ppm of nutrients with 200 ppm of calmag at 6.0 ph . im in week 3 of flower so i have to get this fixed or im going to really affect my yield, i can already see the plant slowing down from this deficiency. even though i dont get why its even happened. iv been feeding 1000ppm with 200 ppm of calmag forever now. all other plants look fine. its just this sativa big plant.


could my humidity cause this? im at 80 degress lights on. 74 lights off, at 45-50% humidity, i feel like this should be fine

Magnesium deficiency. What kind of lights? Where is the worst damage on the plant?

Looks like possible light burn too.

hotrodharley said:

Looks like possible light burn too.

Click to expand...

im using 9 cxb 3590's 720 watts. over two plants, they are extremely close to the cobs, but i have turned them down a slight bit, i have run out of room and i even scrogged them down. the other plant is not showing any signs of problems and looks weeks ahead, im hoping its just the strain, because the one taking longer is sativa and the other indica. but these spots that just started showing 2 to 3 days ago are defiantly gonna hurt, how could it be mag. im giving plenty? and the damage is mostly near the top. so that leads me to calcium or potassium


I guess im just gonna flush with 700ppm nutes and some calmag at 6.1, seems like the only thing to do correct? or should i spray it down and underneath with some sea cal. pure calcium

I'm guessing either lockout or failure to take it up because of pH.

https://goo.gl/images/EB8SMr

". When using a pH scale it is important to know that the decimal points really count. The pH scale is a logarithmic scale which means that for every one point of pH, the concentration changes by a factor of ten. For example, an increase in pH from 7.0 to 8.0 is actually a tenfold increase, so be aware!"

You may know all this but others lurking might not.

hotrodharley said:

I'm guessing either lockout or failure to take it up because of pH.

https://goo.gl/images/EB8SMr

". When using a pH scale it is important to know that the decimal points really count. The pH scale is a logarithmic scale which means that for every one point of pH, the concentration changes by a factor of ten. For example, an increase in pH from 7.0 to 8.0 is actually a tenfold increase, so be aware!"

You may know all this but others lurking might not.

Click to expand...

they thing is they are drinking like normal. is only started happening when it dried out quite a bit. i have never flushed. do you think i should flush? it just hard to do when under scrog.

does anyone else have an experience with what the leaves look like 3 almost 4 weeks into flower?

Obviously you feel it's not the issue so what is? Waiting for someone to tell you what you think it is?

hotrodharley said:

Obviously you feel it's not the issue so what is? Waiting for someone to tell you what you think it is?

Click to expand...

just trying to get confirmation and also confirmation on how i should go about fixing it, flushing with 1000ppm. of g 3 part and some epsom because i heard gh 3 part has plenty of calcium and lacks mag. or should i do 700 ppm nutes and 200 cal mag.