Plant leaf problems. Please check out photos

I currently have 30 plants under 3 metal halide 1000 W. They are currently in there 2nd week of veg. Room temp is about 75 ish and humidity is anywhere from 50-70 on a consistent basis.

I am having issues with my lower growth leaves dying out or turning yellow as well. And some of my new growth is not yellow but a very light green color.

I am using coco with perlite. I have an ro system and my ph is at about 5.9 on waterings.

I know some of my issues come from giving to much nutrients my first week in veg. I was suppose to be feeding about 20 ml part a and b the first week but read the nutrient calculator wrong and fed 50 ml of part a and b. So I know this relates to my current issue. This last watering that I did yesterday I used strictly ro water. Another issue I have is that the coco is taking several days or more to dry out.

I am using advance nutrients sensi coco line. I was planning on going to my normal feeding schedule this next watering which would be 40 ml part a nd b sensi for week 2 feeding. Also 20 ml b 52 and voodo, as well as 20 ml advance nutrients sensizym cal mag.

Could anyone with experience please check out my photos and let me know what they think the issue is and what possible solutions for the problems my babies are having could be. I am not experienced so any expertise will be good.

Also I have 5 1000 watts in this room but only have 3 lights going currently. The plants are in week 2. More or less light? Thanks.

are you feedin Cal/Mag to em ?

RM3 said:

are you feedin Cal/Mag to em ?

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Just a little bit. I did some on my second to last feeding. But According to the hotline on advanced nutrients they said I shouldn't need it. I bought the sensizym cal/mag from the advance nutrients line. Do you guys think I need to start using on every feeding. Wasn't sure if I had a cal/mag deficiency or a nitrogen deficiency.

Cal/Mag is a must in coco

RM3 said:

Cal/Mag is a must in coco

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Yeah but apparently according to the advance nutrients hotline they were saying that with their new ph perfect coco grow and bloom it was not needed. But i will start using my sensizym cal/mag. If i start feeding with cal/mag starting my next watering will my plants be able to come back to healthy form.

I know nothing about AN other than I would never use it but your plants are showing a Mag def. If they were mine I would foliar feed with epsom, but yeah they bounce back if you up the Mag

RM3 said:

I know nothing about AN other than I would never use it but your plants are showing a Mag def. If they were mine I would foliar feed with epsom, but yeah they bounce back if you up the Mag

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Why would u not recommend advance nutrients?

also what brand epsom foliar spray should I use, and do I use it daily or just one day and for how long since I will begin using cal/mag starting on my next feeding in a few days.

Nickolsen said:

Why would u not recommend advance nutrients?

also what brand epsom foliar spray should I use, and do I use it daily or just one day and for how long since I will begin using cal/mag starting on my next feeding in a few days.

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Brand does not matter, you can buy Epsom Salt (Magnesium Sulfate) at the grocery store or wally world, I would mix 1 teaspoon to a gallon of water and foliar feed once or twice a day but that is me, I use salts that I know what is in em and that give me a 5 year supply for less than $30

AN has a following,,,,That's ok.....AN has it's "haters" and I fall into that category.

AN makes wild claims that aren't exactly right. (Being polite here)
AN is another one of those "level" of expertease (note the tease misspelling). Buy this level for this result and continue to buy more levels at increasing cost till you get to the "top". The only real thing their doing is reducing your wallet size while NOT really increasing your bud size! In fact, they want you to use products that have stupid amounts of some nutrients that will (in the end) do more harm then good......
They are a money making machine that caters to the newbie/novice grower by making you believe that their products will make your yields go through the roof with their "special" product formulations. BUNK!

Hesi (some of the best/cleanest core nutrients available for synthetic grows) I would replace the SuperVit and Roots with a good kelp extract....
Canna (not cheap)
Dyna-Gro

Are the 3 best core nutrient lines available today for synthetic grows (my opinion)....

Sea Green is simply put the #1 thing I would say to use for a "supplement" out there today.
When used right, it will reduce your nutrient use by about 50%!!! That's real savings (hmm, back to the "save $" thread) in your pocket. It adds working levels of Humic and Fulvic acids that (and the Kelp base of it), increase nutrient uptake to effective reduction of nutrients used to 50% of what you would use with out it. I use a basic AACT tea in rotation with this and feedings in any synthetic run I do. I use Hesi soil core nutrients.....I use Hesi for any hydro runs also - SO clean! They do make Sea Green in a hydro formula too...