[RuralRoute420]

got these spots on my girl 5 weeks into flower, keeping it simple, what do you think these represent?

[Tokabowl]

RR420, according to the info in stitches' thread here https://www.icmag.com/ic/showthread.php?t=11688 ,
it looks to me as your ladies are deficient in Calcium (Ca), and maybe slightly in potassuim (K) or Manganese (Mn).
What setup are you running, hydro/soil? what is your pH like? what do you feed them? whats your RH etc?

[RuralRoute420]

hydro
dwc
ro water (this is why i think it's a cal def)
ph 5.0-5.5
rh is probably in the 30's, winter, never affected anything before
i am running a really high EC - 3.2
dynagro bloom w/ mag-pro



i've been told to use cal-mag or something or another when using RO water since it's void of everything. anybody know what they were referring too?

i am running 2 other dwc's and an E/F setup with no problems like this though....

[spicecowboy]

It can´t tell you what this is.

So why the fuck do I post here?

Because you are not the only one confronted with this ugly look of the leaves.

During all the grows I´ve done before, I often recognized spots like those, even in my current grow I found leaves looking like that, along with several other problems.

Don´t know what exactly causes this.


Maybe some "experts" could help us out?


Reasons could be:

- Magnesium difficiency

- PH problems/lockout of nutrients

- Pest problems: thrips, white flies

- Stress: Humidity, temperatures(night/daytime difference, not heat)


Don´t panic:

I had some plants totally affected like yours (especially on the older fanleaves), but most of them

produced a big yield of very potent primo bud.


I usually don´t like the idea of cutting fanleaves, but if they start to look very ugly, I cut them off with a clean razorblade.


Best wises, and good luck with your further grow,


spice

cal-mag plus:https://americanagritech.com/product/...1&pro_id_pk=10

that might be your problem if your using RO water as you said you were, its worth a shot to pick some up at your hydro store and give it a try.

[Blackmelo]

looks like calcium deficiency.
can very likely be due to wrong ph but since you are suspecting there to be low amounts of calcium in your nutrient mix you're probly just lacking a little.

Nirvana sell a cal-mag solution
https://www.nirvana-shop.com/solution...s-c-25_29.html

[RuralRoute420]

spacecowboy: i'm not too overly worried about it. although come to think of it this is my first flower with RO water, i'm putting my $ on CAL def. i am running a high EC of 3.2 in only week 5... am ordering the cal mag and test it out. i dont the MG because it got a dose of magpro at beg of bloom....
my ph is fine. no pests in here, my NPS takes care of the little fuckers. my TEMP difference is 8-10'F day/night.


just checked them again a lil closer. and after looking at stitch's thread, it's def cal def. i've got the spots & all the side-tips of fan leaves look nute burnt except for the end tips, so it's not nute burn. thanks all for the help.

[acar]

i've had'em too. Of the 2-pheno from a Chronic/B.berry cross, one plant had 11-blades consistantly in the fan leave. the other was a solid 5-7...maybe a nine--cant remember.

The 11-bladded, Stalky-pheno had it at 5-7 weeks of flower, the other didn't have it.

More leaf-infrastructure? less Calcium to go around?
i'm sorry, i may just be an over-pragmatist.

[mace_ecam]

i might be a stoner, but with an EC of 3.2 the last thing you should have is a deficiency

[MynameStitch]

what EC converted to ppm would be?

it looks like a calcium deficiency but where at on thep lant did those leaves come from?

its either ph issues or calcium problem
and yes having a high EC ppm can and wil cause other nutrients to be locked out depending on what kind of the abundence of that nutrient

so it very well could be caused by to much of one nutrient or more ph issues