brown circular spots

hi could anybody give me some advice on what maybe wrong with my plants
they seem to have some dark circles almost like cigarette burns on some leaves the strain is black domina they are 2 week into veg and otherwise looking healthy is this somethin to worry about thanks in advance

How often have you fertilized them

Post some pics, will help greatly in diagnosing the problem.

thanks for the reply its much appreiciated here goes.......
i have 8 clones growing in coco 10l pots under a 600w hps light
i feed them when the top inch of the coco becomes dry which can be twice a week
i will get some pics up tomorro, this is my first attempt so all help is very welcome

if its just on one or two leaves sometimes when leaves touch they for lack of a better word sweat and can cause some spotting on leaves if your rh is to high say around 62% and up

white frost u may have cracked it,
my rh has been as high as 70 but is under controll now,they were quite close together too,is im still not sure how much to feed them tho should i be seeing feed in the trays or is that over feed????

without pics who knows. Could be MG def.

I water every other day, and feed every time I water in coco.

ftw77 said:

im still not sure how much to feed them tho should i be seeing feed in the trays or is that over feed????

Click to expand...

What nutrient line are you using, whats the recommended dosage?

coco is an inert medium, so in essence it is just like hydroponics.

if you are container gardening (which I'm sure you are) make sure every time you water, to get 20% run off or more.

i do ebb and flow coco is something im not sure of

https://www.rollitup.org/indoor-growing/163510-coco-growers-unite.html

https://www.rollitup.org/general-marijuana-growing/418433-pukka-buds-coco-grow-journal.html

read both those threads. You'll learn alot about coco.

pics will be up tomorro, im using canna products
coco a+b @ 125ml per 50l
rhizotonic @100ml 50l
cannazym @125 per 50l
im using a chart i got off a site what do u think is this ok ?