Nutrient problem? rep for your thoughts

-I just noticed this on one of my flowering plants.
-I switched to 12/12 5 weeks ago.
-I am using all Roots soil, Flora Nova nutrients, I added Canna PK1314 (recommended dose) this week, Molasses(1 tablespoon/gal), teaspoon of h2o2 per 2gal.
-This plant is 32 inches tall and in 15 gallons soil. -
-I use a soil probe since its a big pot to decide when to water, I feed them 2 times then do just water. In these pots it ends up being every 3 days that i either water/feed this plant. I dont always get runoff when i water, but i try to every 3 times or so.
-The problem is happening at all heights on the plant, and the plant is 18 inches under the light.
-The lights are a mix of HPS and MH, and there is 1800w in the 4.5' x 9' tent. This plant is centered under the MH and has HPS on either side.
-I am injecting CO2 but my vent fan is always on, concentration is 1200 ppm when vent fan isnt on so hopefully i am getting some of it to plants.
-Temp is 78F, and rh is always 50 or below.

It looked like calcium deficiency in my book, but im new and dont really know what im doing. It also looked like ph problems in the book to my untrained eye.

The last picture is a wall planter i just made to see if i can use some extra space, think I'll get anything out of it?
Id sure appreciate any input, thanks. I'll give you rep

by the way, im a super hot chick. not that that should make a difference in getting some help

Yeah its looks like it is calcium def.

is that because of too low of ph do you think? ph lockup? i had been watering / feeding at 5.8 for a while. I was thinking of raising that, and measuring my runoff. I am reading 6.5 is best for soil.
Should I flush and then feed them with normal bloom nutes?
thanks for the comment

PH doesn't have to be exact, but the closer to 6.5 is best. I doubt it is because of lockout, have you tired adding any calcium?

How severe is it right now? Did it start on lower branches and move up the plant towards new growth?>

I am using Flora Nova Bloom, and also PK1314 for the last week. There is Calcium and Magnesium in the bloom. Do you think the PK1314 caused a prob?

its in random spots throughout plant. there isnt any new growth lately but the problem is at allheights

I just had this exact problem... I leached with 6.0-6.5ph'd water then added some General Organics CalMg+ and it fixed the problem almost immediately... Hope this helps

Maybe try adding some calmag to the solution and see how that works. How many weeks longer you going to flower 4 weeks?

3 weeks.
OK, Ill flush. Should I use epsom salt?
And Cal mag, sounds good, thanks for the help.
did the leaves that were effected go back to nice green leaves ptone?

make sure you don't have a spider mite problem. they live on the bottom sides of the leaves
But it looks like Calcium or Iron

Have you seen this: https://www.rollitup.org/general-marijuana-growing/1469-marijuana-plant-problems-cures.html

Lots of good pics and info right here on RIU

Good luck and make sure you answer if it clears up or not...JR

epsom salt isnt needed if you use calmag. No leaves didnt go back to normal and leaves that are over 50% damaged should be removed so that the plant doesn't expend energy trying to repair them

nah forget the epsom salts your not having a mag problem, its all the calcium droooog

yeah, i have looked at all the problem stickies etc and it looked like cal or mag deficiency. I just didnt think it made sense cause i am using simple 1 part nutes and just roots organic soil, not like im doing something fancy. I looked for mites when i saw the problem this morning, they are visible to naked eye right? Plus, its surrounded by other plants and none of them have this issue. They are clone sisters too.

Different soil than the others?

So is it mites?

just to follow up, i found my runoff to be ph 5.0. I dont know why, the only thing i did different is adding PK1314 before that, adding to my flora nova. I ph after mixing my fertilizer so i dont know but i will stick to just the flora nova only in the future in soil i guess and see how things go. I have only been able to get the runoff to 5.5 but the plant seems to be holding strong. I just fed it this morning for the first time since this went down, hopefully the buds get fat now, cause they got stunted during all this.
thanks fro all the help