A few leaf symptoms I need help with (newbie)

Hey guys I'm on my first grow at the moment and all is going pretty well, I had a friend look after them while I was on holiday and they did okay.

I have a few problems that aren't causing too much of an issue to growth as they are doing quite well from what I know however I'd like to solve them as I don't want to have an issue down the line.

My grow room consists of 6 23w CFLs and have 3 60w (cant fully remember) LEDs coming in about a week. Currently growing in coco/perlite mix (70/30) and using a basic hydroponics A+B nutrient which provides little amounts of ca/mg so I haven't worried about getting a cal/mag supplement as its quite difficult to get as no where sells it where I am based.

I have looked online about leaf symptoms but theres a couple which point to what the problem is but there's no clear answer plus I'm pretty lazy so I'd like to get some help from the community to diagnose the problems I'm having

P.S. All plants grown from seed

3 at the back are 40-43 days old and the and are:
https://shop.ilovegrowingmarijuana.com/products/gold-leaf-marijuana-seeds
(the one on the front right is the same strain as the back 3.)

3 at the front are 18-20 days old and the 2 on the left are:
https://shop.ilovegrowingmarijuana.com/products/blueberry-autoflowering

Probably just from being in contact with the soil. Overall they look pretty healthy so I would worry to much right now. Just monitor and continue as your doing.

Make sure you pH your water. Cut those bitches off. Be sure not to over water and have a good time. They don't look too bad to me.

Awesome thanks man! Should I cut them at the node or just where the discoloration starts

they do look good and im sure will be fine but

I think you might be over fertilizing them

id not add any nutes and only water with plain phd water

the leaf sag is either over watering or to much N... theyre very dark green so I think its to much N

when you do go back to fertilizing ... (it about 10 days)...... mix the nutes at half whatever your giving them

if the lower fan leaves show mild yellowing raise it up some but not to much.. maybe 20%

Regulous said:

Should I cut them

Click to expand...

I wouldn't, they look plenty green and doing the photosynth thing. When your plant is done with them you will know, I let mine go yellow before snipping them.

Thanks guys, yeah I just flushed the back 3 2 days ago and just gonna wait for them to all dry up and feed em all water for a bit and then go back to nutes, not sure what schedule to keep them on, should I feed every 3rd watering or so?

I keep making the mistake of feeding them because I think they need 'food' but really the light is their food. Just an instinctual thing really.

Okay the one plant that had a bit of trouble has now spread up to the next leaves, not sure what this is

picture of entire plant please

What is calcium and magnesium % on your nutes? May need cal/mg supplement if its not already in your nutes.
Ph is extremely important for nutrient uptake...coco should be around 5.8 .

Lockout ,hot nutes , or cal mag

Just back after the sites been down for ages, im away from my plants at the moment but I can't get a cal/mag supp anywhere in my city, I'm away for a few days in a bigger city so should be able to find something. the cal/mag % isn't very high on my nutes so I'll probably need it but thing is, this isnt happening on any other plant, just the 1

I wish you could post an updated pic

im not sure id be in a rush to add calmag
since its mild and only affecting 1 plant and a couple leaves I would hold off

its got a good amount of N in it and a good bit of calcium but its not the best source for magnesium

theres a relationship between K and Calcium and Magnesium

the three compete for uptake.... if the ratio between the 3 is out of balance you end up with lock out and chase your tale trying to sort it out

when the pictures are able to be uploaded again, post updates of your plants also post pics of the part A&B bottles
I need to see the % info listed for each element on the back of the bottles

itll look something like this;

N..........2%
P...........0%
K............5%
Ca..........3%
Mg..........0.5%

if you post the pics of your nutes I will tell you if your in need of calmag and how much

if you can find it while your out go ahead and get it
its always good to have and youll likely need it... maybe!

Thanks so much, have someone else taking care of the plants at the moment, will be back in a week or so to check. Will post updated pics and whatever symptoms pop up While the site was down I had a gander at grasscity and such and there's so much hate for this site for some reason but you guys have been super helpful!